Blue Screen no user login

The Computor starts up, normal chime grey screen with apple logo, then the normal osx starting screen then it just goes to a Blue Screen with the mouse in the top left corner.
No login screen.
There should be Five accounts.
One time it came with a black screen and lots of white printing, most normal, but it did say login not found
I ran Apple hardware test it said all is fine.
Any help would be great!
Thank you

I repaired disk Permissions = No Problems
When I ran Repair Disk it says
Checking HFS Plus Volume
Checking Extents Overflow File
Checking Catalog File
Invalid sibling Link (in RED )
Volume check failed (in RED )
Error: The underlying task reported failure on exit ( in RED )
1 HFS volume Checked
1 volume could not be repaired because of a error ( in RED )
First aid Failed The underlying task reported failure on exit

Similar Messages

GE60 0NC-622UK laptop is stuck on Blue Screen can't login! please help..

Had this laptop for just one month, before it's all good. Windows 8 64bit.
In last two days, the mouse and touchpad became dysfunctional occasionally, able to move the pointer but just could't click on anything regardless of left or right, e.g. choose or open new. It would be working after logoff/relogin and reboot, but same problem still came up randomly.
Last night, I did the same thing to reboot the laptop after had the pointer dysfunction, but then it displayed a blue screen before the login with a error called 'System Thread Exception Not Handled', and then just stayed on this page would't reboot automatically (waited for 30 mins), so it left me no choice to shut it down by pressing power on/off button manually, afterwards with couple of times rebooting, it just kept going into this same blue screen and could't get into the system...Sometimes it would automatically start diagnosing before blue screen, ask me to restore or repair, but none of them fixed the problem, repeatedly stuck on blue screen every time...
And I don't have any windows 8 dvd, delivered box only has one for drivers and manual book.. so boot from dvd is not possible..
p.s. sorry about my english if caused confusion
thanks..

Quote from: Neoistheone2000 on 06-June-13, 00:26:05
Try starting Windows 8 in Safe Mode, its kinda difficult in Windows 8 to do you have to be very precise when doing it, right as the system boots you need to start spamming F8 sometimes you have to do Shift+F8.
You may want to disable fast boot in the BIOS so you have some time to get ready to hit the buttons, once you get the boot menu up try Start Up Repair first and see if it fixes anything then try booting, if noting then try safe mode and un-do anything you have done to the system recently.
Let me know how this goes.
Really appreciated your help!
I get into troubleshooting page by pressing F3 when laptop was booting up, and changed start up with Safe mode which works..I've done many things in Safe mode, like updated drivers, run anti-virus program, deleted recent installed software, and then somehow the blue screen error was gone after reboot...It seems one of them must be the cause for that problem.
Anyway, my laptop is working properly now, thanks a lot, if error happens again in future i might still need some help

Blue screen, can´t login and my Hard Disc appears to be still alive...

I already started up using my installation disc, used the disc utility, made 100 repairs and verifying, already started up holding down the shift key for a safe boot and trying to login but my mac appears to be negative about signing in into my user... I turn on my computer, when I login using my password a blue screen appears and then... nothing... same blue screen. This problem just occured when I installed the last update for software... please help me out, I´m so desperate, I´m working on a PC :S thnx

thnx apple support, i solved the problem myself...

Startup issue - blue screen freeze before login - Safe Boot works fine?

I've not seen this before and I can't fix, wonder if anyone has any new suggestions, here is what I've tried so far... (safe boot works fine)
1. Verbose and Single user login
2. removing the startup folder from disk library
3. Zapping PRAM
4. Reset SMC
5. Zeroed disk and reinstalled system
6. Target disk and disk repair (No Problems Found)
7. Permissions repair (No Problems Found
8. Apple Hardware Test (No Problems Found)
9. System DVD Startup - Disk Utility (No Problems Found)
10. Network Startup - Disk Utility (No Problems Found)
In every case unless I hold the shift key down for safe boot, the mac will freeze on a blue screen when the grey screen disappears, and never proceed to login. Thought about replacing the disk but it's a lot of bother on these machines and there doesn't appear to be anything wrong with it??
Any ideas?
Can anyone think of a possible fix not listed above?

Hello chip
The only thing I see missing from your list is, have you disconnected all External HD's, iPods and other storage devices befor Starting up? Sometimes when the iMac has multiple storage devices connected the Startup Manager will get lost.
Also try going to: Startup Manager in System Preferences, select the Macintosh HD and restart the iMac..
Dennis

Blue Screen Error while login screen in My Compaq CQ40 133TU

Mate ,
I cant login my system. when i swtich on my sytem till login screen it ll coming , but after that showing blue screen error wth this error code
*** stop : 0x0000008E (0xc0000005, 0x0044005C, 0x92000908, 0x00000000)
What to do ? Please give a solution
Product : Compaq Presario CQ40
S/n :[Personal Information Removed]
P/N : FW554PA#ACJ
os : wINDOWS 7

Hi
Please find the link given below might help you to resolve your issue.
http://support.microsoft.com/kb/315335
http://support.microsoft.com/kb/827663
Let us know how it goes!
"I work for HP."
****Click the (purple thumbs up icon in the lower right corner of a post) to say thanks****
****Please mark Accept As Solution if it solves your problem****
Regards
Manjunath

What is happening when blue screen appears at login

Does anyone know what the OS is doing between the time the while start up screen with the spinning timer(?) goes away until when the user list appears?
The reason I ask is that the blue screen seem to be taking longer than usual, and I am wondering what might be happening and if I should be concerned.
All help appreciated.

If you hold down Command-V during boot, it will go to verbose mode and you can see what is going on.

Blue screen and no login at start up after 10.6 install

After installing 10.6, I am not able to log into my MacBook Pro, unless I do so in safe mode.
I get passed the grey apple/boot up screen, then rather than having the list of users, I just get a blue screen (the mouse is there).
I have tried the following:
1. Booted from external drive and repaired permissions.
2. Logged into safe mode and deleted all start up items.
3. Reset the PRAM ect.
4. Removed all items from the "startupitems" folder within library.
5. Tried fresh install.
Any other suggestions?

Hi acl2009 & welcome to discussions.
1. Booted from external drive and repaired permissions.
Not recommended if that happened to be an older OS version - only use the version of Disk Utility that comes with SL. Boot from the installer DVD and use DU from there.
Any other suggestions?
Take your laptop and your SL DVD into the nearest Apple Store and ask the staff there for assistance...

Stuck between blue screen and cosmos (login)

Last week the latest security patch (snow leopard 10.6.4) and Safari patch came out. I was busy at the time so I waited to install them. After I got around to doing it, my late 09 i5 iMac will not get to the login screen. It posts, then the grey screen goes away to the blue screen which thinks for a bit and then kicks it over to the "cosmos" screen (which is fine so far), but after a second or two it goes back to the blue screen, thinks some more, goes to the cosmos, etc.
Things I have tried:
Used the setup disc to verify/repair perms and verify disk (A-ok, no need to repair)
Reset PRAM/NVRAM
Attempted to boot into safe mode (no luck)
Boot into 64bit mode (hey, why not)
I have already reimaged from Time Machine once, and it took 6 hours so I'd like to avoid that again. Does anyone know a solution to get it to boot, or is there a way to roll back updates without going the Time Machine route?

Thanks for your reply Scott. I'm trying to avoid that if possible, but I can't see why that would be a problem. Just trying to see if I can save the current state before I go and do that.

Blue Screen Stuck in Login

alright, i've tried all the sultions there is, and nothing has worked.
i've reinstalled, updated IE, updated java, ran login clean up thingy, updated skype, opened up cmd and pasted those things in, and nothing has worked.
what should i do? this has been happening for about 4 days.
Solved!
Go to Solution.

Resolution:
Reset IE
Run the LoginClean up file : https://az545221.vo.msecnd.net/skype-faq-media/faq_content/skype/other/logincleanup.zip
If unable to extract the Zip file from LoginClean up, Manual step (create a Batch File)
a. open notepad
b. copy and paste the script below:
@echo off
setlocal
set ProgFilesRoot=%ProgramFiles(x86)%
set LocalAppDataRoot=%LocalAppdata%
if "%ProgFilesRoot%"=="" set ProgFilesRoot=%ProgramFiles%
echo Stopping skype..
start /B "SKYPE" "%ProgFilesRoot%\Skype\Phone\Skype.exe" /shutdown
ping 1.1.1.1 -n 1 -w 3000 > nul
echo Cleaning up login content..
if "%LocalAppDataRoot%"=="" (
goto :XP
) else (
goto :Cleanup
:XP
set LocalAppDataRoot=%userprofile%\Local Settings\Application Data
:Cleanup
cd %LocalAppDataRoot%\Skype\Apps
del /S /Q login\*.*
rmdir /S /Q login
echo Starting Skype..
start /B "SKYPE" "%ProgFilesRoot%\Skype\Phone\Skype.exe"
ping 1.1.1.1 -n 1 -w 3000 > nul
echo Done
endlocal
c. Name it as Skype.bat and save it on desktop.
d. New icon will be created, image like a gear icon named Skype e. Right on it and then run as administrator
f. Wait for it to load and check if resolve.
If one of my replies has adequately addressed your issue, please click on the “Accept as Solution” button. If you found a post useful then please "Give Kudos" at the bottom of my post, so that this information can benefit others.

MBP stucks on blue screen on login, even after complete reinstall

Hi everyone!
This is REALLY driving me nuts. Three days ago, I found one of my MBP apparently on sleep but with fans running full speed and unable to wake up. As usual, when this happens I just force it to turn off but this time after the Apple logo (OS loading) I got stuck on a blue screen before the login window.
*What I already have DONE trying to solve this (please read)*
- PVRAM reset
- SMC reset
- Full check with Disk Utilities (no problems)
- Started on verbose and single-user mode and done almost everything there (fsck, checking console.log, etc…)
- FULL OSX REINSTALL, erasing every partition (even "zeroing" the disk) and installing from external drive (installing from DVD didn't seem to work, but the optical drive is fine). Still same problem.
*Other symptoms*
- After waiting like 5-10 minutes on the blue screen, it shows the login window just fine and I can login. From there everything seems to work OK. I can use my computer "fine"
- OSX loading (gray screen with the Apple logo) takes forever
- Mac doesn't wake up from sleep
- It runs quite hot
- I can boot in safe mode, but the auto-check at the start of that mode doesn't solve the problem
- When it is stuck on the blue screen, no cursor is shown. If sleep mode kicks in, the computer freezes on the login screen, can't do anything.
At the beginning I said that one of my MBP was affected. Well, one day after the EXACT SAME happen on my OTHER MBP, EXACT same symptoms. (MBP 4,1 and 3,1 both on 10.6.6)
I think this could be a corrupt firmware (remember this happens even with the complete reinstall) or a really weird hw failure or something beyond the OS.
As you can read, I can use my computer (both). I'm writing this on it in fact. But I can't fully fix it and I have spend almost entire days on backups, possible fixes, forum browsing… really this makes my days a living **** (not kidding!)
Please help me! Thanks in advance (And sorry for my english and the long post!)

nachX00 wrote:
HD is almost empty. 10 GB out of 320 used.
Retail SL
Well, neither of those should be the issue.
Can't check the FW ports, as I don't have a FW cable (they are somewhat hard to find on my city)
The reason I ask is because there have been a few cases here where the initial boot process was searching and searching for a FW port, but the port was dead, and it caused long delays similar to yours.
No, no new HD or RAM, but is not stock HW (upgraded RAM and HD several months ago, never a single problem on either computer).
RAM may be suspect. Have you updated software recently? Some RAM can be compatible with an earlier OS, but then out of spec after an update. If you have the original RAM, I would put it back in and see if that's the issue. If issue persists, try removing one of the modules and booting; if that doesn't work, swap the module into the other slot. Repeat with other RAM module. This will troubleshoot the RAM and both slots.
There also seem to be a growing number of issues with non-Apple-branded HDs, so I'm not sure that can be ruled out. If you have original HD, and the time to put it in, and you want to get to the bottom of this, you may want to give that a try.

Blue screen hangs logging in as main user (tried extensive troubleshooting)

My systems state has been progressively declining...
First symptoms: while using my external FW drive, under heavy read/write use the drive would unexpectedly unmount, giving the "unmount your drive before disconnecting it to avoid data loss" message.
I ran DiskWarrior on the external drive. It still would unmount. Somewhere online I read that zapping the PRAM may fix it. I did that. That's when things got bad.
My computer began beachballing all over the place, so I rebooted. Full disclosure: it's been running slow sometimes due to the SOHO Sync process (I am running the SOHO Notes 5.7.0 beta, and I haven't ruled out this software as the culprit). Upon reboot, it would hang on a blank blue (aqua) screen - after the gray screen but before the login window or anything.
I booted into single-user mode and ran fsck. It found nothing wrong.
Tried to boot into Safe mode extensively. Sometimes I could get to the login screen. Tried extensively logging in as my user, it would just hang on a blue screen. The secondary user works, although sometimes verrrry slow (beachballs).
I began following the instructions in this article. Many of the first solutions (#'s 1-3) involve Safe mode, but since my account couldn't get into Safe mode I began moving Preference files and such using single-user mode (#'s 4-6). On step 7, I got through items a-m, but the rest of it is contingent upon being able to log in, which I still was not.
Using the secondary login, I was able to open Console and glean some information from that. mdimportserver was crashing over and over again, sometimes causing crashdump to crash as well. I figured this explained the slow performance and intermittent beachballing while using the secondary user. lsregister was also crashing occasionaly. In system.log, I saw several I/O errors.
Finally I decided to run DiskWarrior from the CD. It found some errors (I can post the report later) and corrected them. I rebooted, still would blue screen on my login name.
I reset the PMU. After this the secondary user ran pretty much normally for a short time. I removed the couple third-party mdimport files (Spotlight plugins) I could using the list dump from running mdimportserver -L and renaming the third party ones. (I know SOHO Notes includes Spotlight support now, but I could not find their plugin for the life of me, I'm not sure how they have enabled Spotlight support).
Still getting I/O errors in system.log. The secondary user is not working very well anymore (slower w/ beachballs).
This whole time the SMART status of my boot drive has been "Verified"
So - is my drive dead?
PowerBook G4 1.5Ghz (12) Mac OS X (10.4.2)

Update:
Using the secondary user in Safe Mode has allowed functionality enough to reformat an external drive with Disk Utility (although the drive spun down and Disk Utility didn't do anything while still saying 7 minutes left on the zero-all operation).
I force quit Disk Utility and reboot into Safe Mode. Got the startup progress bar, then the blue screen, then the screen went to a black with white lettering saying:
<time & host name> getty: /dev/console: Operation not supported by device
Then it would go back to aqua blue for a few moments, then back to this.

Blue Screen at login if printer and TM in USB ports

I recently started experiencing a bizarre problem I have never had at login after a restart or shut down. I first realized something was weird when my wireless keyboard was no longer working properly in that the bluetooth would randomly lose the signal and batteries were fresh. After purchasing a new apple keyboard I realized something was wrong with the computer itself, not the keyboard. This is what happens:
Normally when it loads up, I go to the white screen with the turn wheel, then a sky blue screen, then the login window where i enter my password and the nice leopard thing in the background, then loads my wallpaper and you know it works. But recently, the white screen stays on abnormally long then it goes to the blue screen where it gets stuck. No error messages or anything. I can't put the computer to sleep or type anything. So I pull the plug or hold the power button to restart. What I realized is that anytime something was in the USB ports, it wouldn't go past the blue screen. I was running time machine on a lacie hard drive, an HP printer, an iphone and ipod nano. The weird thing is that if just my iphone is plugged in, it will load, BUT if the printer and time machine are plugged in, it gets stuck. I tried just the printer and just the time machine separetly without the iphone, and it still does not load. Just the iPhone, it loads perfectly. When it does load I plug the time machine back in and printer back in. The printer works fine. The time machine just says preparing for about half an hour until it just says "Latest Backup: --" in the top window bar.
I did repair permissions twice, then did it with the leopard dvd, then did it on the time machine and no luck. I checked the power supply in the back and all the LED lights came on so nothing wrong with power. The Internal Hard drive doesn't sound abnormal. I checked the console during the start up period and it says a lot of these messages: "
4/1/08 12:28:51 AM com.apple.SystemStarter[18] Break on _THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___Y OU_MUST_EXEC_() to debug.
4/1/08 12:28:51 AM com.apple.SystemStarter[18] The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
4/1/08 12:28:51 AM com.apple.SystemStarter[18] Break on _THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___Y OU_MUST_EXEC_() to debug.
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[114]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[114]) Exited with exit code: 1
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:28:58 AM com.apple.SystemStarter[18] qmasterd: terminated due to signal().
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[116]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[116]) Exited with exit code: 1
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[117]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[117]) Exited with exit code: 1
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:29:13 AM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[82]) Exited: Terminated
4/1/08 12:29:13 AM com.apple.launchctl.Aqua[118] launchctl: Couldn't stat("/etc/machinit_peruser.d"): No such file or directory
Then it goes on and on about throttling respawn
I have iMac G5 2 GHz 1.5 GB RAM no internal isight.
If you have any suggestions I would really appreciate it.
Chris

I recently started experiencing a bizarre problem I have never had at login after a restart or shut down. I first realized something was weird when my wireless keyboard was no longer working properly in that the bluetooth would randomly lose the signal and batteries were fresh. After purchasing a new apple keyboard I realized something was wrong with the computer itself, not the keyboard. This is what happens:
Normally when it loads up, I go to the white screen with the turn wheel, then a sky blue screen, then the login window where i enter my password and the nice leopard thing in the background, then loads my wallpaper and you know it works. But recently, the white screen stays on abnormally long then it goes to the blue screen where it gets stuck. No error messages or anything. I can't put the computer to sleep or type anything. So I pull the plug or hold the power button to restart. What I realized is that anytime something was in the USB ports, it wouldn't go past the blue screen. I was running time machine on a lacie hard drive, an HP printer, an iphone and ipod nano. The weird thing is that if just my iphone is plugged in, it will load, BUT if the printer and time machine are plugged in, it gets stuck. I tried just the printer and just the time machine separetly without the iphone, and it still does not load. Just the iPhone, it loads perfectly. When it does load I plug the time machine back in and printer back in. The printer works fine. The time machine just says preparing for about half an hour until it just says "Latest Backup: --" in the top window bar.
I did repair permissions twice, then did it with the leopard dvd, then did it on the time machine and no luck. I checked the power supply in the back and all the LED lights came on so nothing wrong with power. The Internal Hard drive doesn't sound abnormal. I checked the console during the start up period and it says a lot of these messages: "
4/1/08 12:28:51 AM com.apple.SystemStarter[18] Break on _THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___Y OU_MUST_EXEC_() to debug.
4/1/08 12:28:51 AM com.apple.SystemStarter[18] The process has forked and you cannot use this CoreFoundation functionality safely. You MUST exec().
4/1/08 12:28:51 AM com.apple.SystemStarter[18] Break on _THE_PROCESS_HAS_FORKED_AND_YOU_CANNOT_USE_THIS_COREFOUNDATION_FUNCTIONALITY___Y OU_MUST_EXEC_() to debug.
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[114]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[114]) Exited with exit code: 1
4/1/08 12:28:52 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:28:58 AM com.apple.SystemStarter[18] qmasterd: terminated due to signal().
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[116]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[116]) Exited with exit code: 1
4/1/08 12:29:02 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[117]) posix_spawn("/Applications/CheckUp.app/Contents/MacOS/CheckUpAgent", ...): No such file or directory
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent[117]) Exited with exit code: 1
4/1/08 12:29:12 AM com.apple.launchd[1] (com.app4mac.CheckUpAgent) Throttling respawn: Will start in 10 seconds
4/1/08 12:29:13 AM com.apple.launchd[1] (com.apple.UserEventAgent-LoginWindow[82]) Exited: Terminated
4/1/08 12:29:13 AM com.apple.launchctl.Aqua[118] launchctl: Couldn't stat("/etc/machinit_peruser.d"): No such file or directory
Then it goes on and on about throttling respawn
I have iMac G5 2 GHz 1.5 GB RAM no internal isight.
If you have any suggestions I would really appreciate it.
Chris

Day after I got it - stalling at blue screen

Hi All,
Just got a newly refurbished 20" iMac yesterday. Worked perfectly fine last night.
This morning, I went to turn it on and left it there for a while. Then I came back and it was asleep, and b/c I didn't have much time and didn't remember how to get it out of sleep mode, I simply shut it down.
When I restarted it, it went through the OSX boot up, but then stalled at the blue screen before the login as user comes up. The mouse was appearing and working fine, it's just the screen sat there as blue. I tried restarting again - same thing. Then I tried restarting holding the option key and clicking the hard drive icon when it came up, but still, same thing.
I'm transferring from PCs and was looking forward to a trouble free mac experience, but this is becoming pretty frustrating so far.

Hello, and welcome to the iMac Intel Apple Discussions.
Whenever you force quit a Mac, as you did, you run the risk of damaging the disk directory. If you want a trouble-free experience with a Mac you need to at least allow yourself the time to understand the basics, and not blame the computer for something which you did. The old computer adage even applies to Macs, "Garbage in = garbage out."
If you can boot to the Install DVD, after selecting your language, when the installer appears go to Disk Utility under the Utilities menu. In Disk Utility select your HD, the top listing in the left hand side, and in the First Aid pane press Repair Disk. If it lists any repairs run it until no more repairs are reported. If no repairs are reported, you may need to reinstall the Mac OS. If you have not really installed anything on your Mac which you mind losing, I suggest a complete erase of the HD, writing zeros, and a new custom install. With a custom install you can reclaim about 5 to 6 Gbs if you install only the language resources and printer drivers you need for your Mac. The Custom button will appear at the bottom of the installer as you progress through the install screens. After you press it the installer will show you what is being installed. Press the triangles to show more details. Remove the check mark from printer brands and languages you do not need on your Mac.
If you have installed a lot of personal items on the Mac; photos, music, etc., then you can do an Archive and install, which will install a fresh Macs OS X but preserve all your personal files and settings.
Everyone is friendly and helpful here in the user to user forums, but first impressions set the tone for your experience. You were very dismissive of a brody in his attempt to assist you, "I don't think that's the problem...Anyone else..." He is a very experienced and respected contributor in the Apple Discussions. If folks feel that is going to be your approach to assistance, they will read your problem, see how you treat people and move on without offering any help.

Very Strange Rendition of the "Blue Screen" Problems

So I'm familiar with some of the blue screen freezes, but the problems that I am encountering are very very strange, so let me start:
Two computers are affected: a MacBook Pro and an Aluminum iMac. Both computers are running Leopard.
The MacBook Pro:
A few days ago, it crashed to the blue screen. Turned the machine off and powered it back on. The computer goes to the gray apple screen, then to the blue screen. Once at the blue screen, it does this: Blue screen for a few seconds -> progress indicator spins for a few seconds and disappears -> Mouse shows up for a few seconds and disappears -> Blue screen -> Progress indicator -> Mouse. It cycles like this indefinitely. I tried deleting the loginwindow preferences. I also tried deleting application enhancer preferences, no luck...
The iMac:
Started up fine. After a few minutes of not using the machine, it will go to the blue screen. Turn machine off and it starts again. Here's where it gets strange: If you start up with safe mode, the iMac exhibits the blue screen cycle on login that the MacBook Pro experiences. Without safemode, it started. So, I tried creating a new user account to see if it was user preferences, and up on doing that, now the iMac gets hung up on the blue screen login cycle just like the MacBook Pro with or without safe mode.
So... weird/misc. parts:
Two machines that have been running leopard for some time, no recent upgrades.
Problems starting happening at around the same time.
Computers linked on LAN and Time Capsule.
Both computers using MobileMe.
I'm stuck - any ideas?!?!
Message was edited by: mpaulsen
Message was edited by: mpaulsen

Some additional thoughts...
the MacBook Pro did not have automatic login and had the problems. The iMac did have automatic login and did not have the problems. When automatic login was disabled on the iMac, it did have the problems. When the iMac used safemode, which disables automatic login, it had the problems also.
So... clearly something with the login window is messed up... but I tried deleting the login window preferences with no avail. Not sure what this means, but interesting I suppose.

HELP PLEASE!! Boot problems with Snow Leopard (Blue Screen Loop)

Hi guys!
My MacBook (the model before the current one) wont boot up. It started stuttering and acting strange and then froze so I did a force restart. It then loaded all the way up until a blue screen when the mouse appears and can be moved. This flickers off after a few moments (the screen dims) and then comes back. The process repeats as if in some infinite loop.
The main problem is that I've lost my snow leopard disc so I'm pretty limited to what I can do until I can borrow / buy another one and I need to get my laptop back up right away for work.
I've tried booting in safe mode, no joy
I then tried to repair the drive in fsck, which repaired something. I did it again and it said all was ok but then booting stuck at the same place.
Finally I read on another forum that removing /Library/Preferences/com.apple.security.plist fixed login loop issues. I attempted this in single user mode but it said the file didnt exist?
Can anyone help me out here? I'm pretty stressed out as all my work stuff is on there for my new job...
Thanks!!

I had this same problem -- machine would boot, but loop at two blue screens before the login window. I sshed into the machine and checked /private/var/log/system.log and /var/log/secure.log which showed a unexpected character in /etc/authorization. Basically, the authorization file was corrupted (most likely by bad RAM.) The solution was to replace this file with one copied from another machine. I didn't match models, but did match OS when copying the file (i don't know if this matters at all), and as soon as the "cp" command was entered, the login window popped up. <-- totes awesome. The machine has been reliable since (all of 15 minutes)

Blue Screen no user login

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