No wifi after startup

Yesterday I dit a fresh clean up of my MBA.
Following the instructions on this website and others.
The reason for this is that I had a annoying problem which not disappeared afther the fresh installation
The problem is that when I do a cold boot up of my MBA, it has problems connecting with the WIFI.
If I turn the WIFI off and on again, it immediately makes connection and stays alive.
I tried several tips I found through this website and on other places.
All failed to help me.
The wifi network is being made by Apple router and I have another MBA whith no problems, also two iPads and a iPhone have no troubles at all.
Anyone any suggestions to make this work?

Which computer are you experiencing this on?
There are several threads dealing with (mostly) iMacs + bluetooth keyboards/mice and issues with WiFi no longer automatically connecting. There seems to be some issue that 10.7.3 introduces with these series of macs.
No Apple provided solutions yet, but several workarounds: 1) attach a network cable direclty from modem/router to mac; 2) use the power button instead of mouse/keyboard to wake up mouse; 3) use USB keyboard/mouse (not personally confirmed); use airport extreme/express as a bridge.
Right now it's a waiting game until Apple provides another update. I do recommend going to Apple feeback: (http://www.apple.com/feedback/) and at least voicing your opinion. Calling AppleSupport will do the same, but they'll make you go through the same (likely useless) steps everyone else has done.
Good luck!

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Wifi no longer connecting after startup

wifi no longer connecting after startup... so I have to connect manually... started after 10.7.3
any ideas

Which computer are you experiencing this on?
There are several threads dealing with (mostly) iMacs + bluetooth keyboards/mice and issues with WiFi no longer automatically connecting. There seems to be some issue that 10.7.3 introduces with these series of macs.
No Apple provided solutions yet, but several workarounds: 1) attach a network cable direclty from modem/router to mac; 2) use the power button instead of mouse/keyboard to wake up mouse; 3) use USB keyboard/mouse (not personally confirmed); use airport extreme/express as a bridge.
Right now it's a waiting game until Apple provides another update. I do recommend going to Apple feeback: (http://www.apple.com/feedback/) and at least voicing your opinion. Calling AppleSupport will do the same, but they'll make you go through the same (likely useless) steps everyone else has done.
Good luck!

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I suggest you reset the SMC (and PRAM, if you are able). That cannot hurt and might help.
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Hi baltwo,
Im sorry but Im new to the community and I don't know how to address users directly. Hence intruding.
It would be kind of you to shed some light on the matter.
I'm running lion 10.7.5 and followed similar procedures but mail downloads every mail again after cataloging and indexing my earlier(snow leopard 10.6.5) mail. More details at https://discussions.apple.com/thread/5373643
It would be great to find a solution as I'm struggling since two weeks.
Thanks,
Abu Suda

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More often than not when a device isn't working it is because the driver has become corrupted. Re-installing a fresh copy should help
http://windows.microsoft.com/en-us/windows7/Update-a-driver-for-hardware-that-isnt-working-properly?SignedIn=1
http://captaindbg.com/how-to-update-drivers-on-windows-7/ (works on win 8 too)
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csdwarf,
So sorry to hear about the trouble with Wi-Fi! Let's get that working the way it should. Could you provide us some more details regarding where this breakdown occurs? Are you having trouble with turning Wi-Fi on or connecting to your Wi-Fi? Are other devices connecting to your Wi-Fi without issue?
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Follow Us on Twitter @VZWSupport

BSOD after startup with Win7

Hello,
After some difficulty I got Windows 7 installed on my Mac Pro. It worked until I installed Boot Camp off the Mac OS X Snow Leopard install DVD. Boot Camp installed, but once I rebooted, about 20-30 seconds after reboot I get a Blue Screen error which says something about a cache management error. It doesn't stay up long so I haven't had a lot of time to study it. On reboot the error report doesn't give a whole lot of info, calls the error "Bluescreen", but it did reference a couple files, I can try to copy them down if it's important (they were long and I only get a few seconds to look at them).
I even tried not logging in and just leaving it after startup, same result.
It's a totally fresh install of Windows 7 Ultimate on a dedicated 500GB hard drive. The only thing I've installed is Boot Camp. I've tried wiping it out and re-installing everything, same results. The first time I installed no Windows updates prior to Boot Camp, the second time I installed all available Windows updates first. Same results.
I'm not sure what could be causing this- it seems like a driver issue of some kind maybe, but it seems like if Boot Camp were inherently problematic with this hardware more people would be having this problem. I can't really think of any other factors that could be interfering... it sure seems like a conflict between boot camp and Windows 7, but I don't see how that should be the case. Despite all the trouble I've been having with this I'm normally a pretty advanced user, so I'm pretty sure I'm not doing anything wrong in the install process (I've done it at my work lots of times), but I know a lot more about macs than Windows.
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Memory: 10GB- 2x1GB stock from Apple, 4x2GB from Otherworldcomputing.com
Hard Drive: 2x1TB Western Digital in a striping raid, 500GB Seagate (the Windows drive), 1TB Western Digital.
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I'd appreciate any input, although the_hatter has already helped me out quite a bit... it seems like Windows really doesn't want to install for me! Just let me know if any more information is required.
Message was edited by: aruffell2

I have exactly the same problem, down to the last detail, except that I got there by a different route.
My history is that I initially installed Windows 7 x64 Home Premium on my 2006 Mac Pro using an EFI install disk I created using the methods detailed elsewhere in this forum. Installed Boot Camp 3.0 from the SL disk then updated to 3.1. Then did Upgrade Anytime to Ultimate. Everything worked wonderfully for three months.
Then I created some striped raid volumes involving three of the five HDs in my machine using SoftRaid. My boot drive (unlike you?) is not raid. Windows 7 Ultimate continued to work perfectly.
Then I wanted to move the Windows 7 partition to a different physical HD, by restoring a Paragon Image (which I have successfully done on my MacBook Pro previously). First oddness was that Boot Camp Assistant would not create a Boot Camp partition of the whole disk, as I wanted, it would only create a second partition, even with the all the raided HDs removed from the machine and uninstalling the Softraid driver. Odd? I put the HDs and driver back in and restored the Windows 7 image to the Boot Camp partition.
This had the same behaviour you described crashed to the Cache Manager blue screen after 20 seconds. It would boot stably in safe mode so I was able to run chkdsk but it didn't fix it.
Then I repeated the whole exercise but started with a restored Vista 32 bit, and reinstalled Windows 7 X64 as a fresh install, (had to start with Vista as my Windows 7 license is an upgrade), then did the Anytime Upgrade to Ultimate, then applied Boot Camp 3.0 from the SL disk. At this point it was completely stable. Then I did Boot Camp 3.1 via ASU and got the Cache_Manager blue screen exactly as before.
Can't find anything helpful with Google about Cache_Manager crashes except the suggestion that there is some kind of massive memory leak going on during the 20 seconds before it crashes.
I have now repeated the process back to Vista 32 bit which is completely stable, and plan to try again, but this time will install BC 3.0 and 3.1 at the Home Premium stage, which is when they were applied in the very original sequence. Also I can use my Home Premium install disk to try a repair install if problems occur again.
I am only trying to get back to a state which previously worked fine, ie with Raid present, Windows 7 x64 and BC 3.1. It should be possible. I know you can't have a Boot Camp partition on a raid array, but my experience is that it was previously OK on a partition on a non raid volume, even with raid elsewhere in the machine.
Don't think I have helped you at all, but it has sure helped me to write it down! Since you posted nearly four weeks ago you may have solved it anyway. In which case I would like to hear from you!

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We have yet to talk to HP Support about it, but no other professional has been able to solve it (and we have had many try). Please help!
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Hi Leo,
Many things could be causing your issue. Intermittent freezes can be very difficult to solve. Since so many professionals have already tried to solve your issue then it's probably time to contact HP Support. As such, I am not going to suggest what has probably already been suggested and/or tested.
I don't know if you are using an UPS but transient changes in line voltage (too low or even too high) will often times cause a failover and clicking noises (relay closing and opening) with some UPSs will be heard. I hear clicks from my UPS at times even though the lights don't flicker. A poor or faulty UPS could cause issues like you are experiencing. You might also having an electrican check the circuits in your house. You might want to isolate your PC equipment off circuits that might have high current start up devices that might cause local voltage surges.
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Great! Thanks, this works.
I have an old Linksys WRT54G in it I can select WPA Personal and AES as algorithm--it works for me (though maybe just changing to anything works! but I will not try anything different since I have spent already so much time with this problem.) Again, thanks for the solution Juan.

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It means that a third-party system modification you installed is causing the problem.
Reboot as usual (not in safe mode) if you haven't already done so. Don't launch any of your usual applications. Launch the Terminal application, copy or drag -- do not type -- the line of text below into the window, and press return:
kextstat -kl | awk ' !/apple/ { print $6 $7 } '
Post the lines of output (if any) that appear below what you just entered (the text, please, not a screenshot.)
Next, do the same thing with this line:
sudo launchctl list | sed 1d | awk ' !/0x|apple|com\.vix|edu\.|org\./ { print $3 } '
That's one line, not two. You'll be prompted for your login password, which won't be displayed when you type it. You may get a one-time warning not to screw up. You don't need to post the warning.
Next, this command:
launchctl list | sed 1d | awk ' !/0x|apple|edu\.|org\./ { print $3 } '
Again, one line. Finally, one more:
ls -1 /Library/{InputManagers,StartupItems}
Remember, this is all drag-and-drop or copy-and-paste, whichever you prefer -- no typing, except your password.
You can then quit Terminal.

No wifi after startup

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