System files deleted accedently

Get a copy of the OS install disk and then open an administrative cmd prompt and type
sfc /scannow
https://support.microsoft.com/en-us/kb/929833

Hi,
One of the staffs have accidentally deleted some files in my system, He do not know which they are but suspects it can be system32.But after this the system still runs and all services are functioning as usual.
But some applications does not open, for example Hyper-V Manager, Server Manager....When i open it says the mmc snap in might not have installed properly, though i can see all these applications still reside inside system32.
I need advise how to restore these deleted files either from the source cd, or any other.
Please advise.
This topic first appeared in the Spiceworks Community

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System file deletion to boot in Lion?

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< Title Edited By Host >

Startup Disk prefPane or hold down OPTION on start and select it.

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hi experts,
i have an issue regarding oracle database on windows XP... one of my client is using oracle 9.0.1.0
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Hello,
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Make sure you have correct entries for Host in listener.ora and tnsnames.ora. What is your machine name? Post your tnsnames.ora and listener.ora entries.
What does your alert.log says?
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Did you try following command
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{code}
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h4. If you have choice of re-install and recreate instance, then I think you should go with it as this way it will be faster to get going.
h4. But if you just want to install software then shutdown instance and listener and re-install same version and try it to bring it up.
Regards

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Won't boot from install discs after deleting some system files

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Hi bboross,
Tough without a Tiger Disk, but try fsck...
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(space between fsck and -fy important)
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http://docs.info.apple.com/article.html?artnum=106214
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What OS version are you on? You're not running iOS 6.1.2 on it.
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Reinstalling Deleted System Files?

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Hello! An archive and istall should do what you want unless you added other fonts than what is normally installed. It does just what it says...it installs a new system leaving your apps and docs intact. Sometimes the preserve user settings etc. doesn't always work as expected. Tom

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To install Lion that belongs to you will require you to repartition the drive first. You cannot do a simple reinstall of Lion over a Mountain Lion system. You will need to follow this guide instead:
Install Lion/Mountain Lion on a New HDD/SDD
Be sure you backup your files to an external drive or second internal drive because the following procedure will remove everything from the hard drive.
Boot to the Internet Recovery HD:
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I had acidently deleted my iphone 4 system file and for now my iphone gatting jam on apple logo

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What are you talking about? How can you "accidentaly delete" the "system file"? And what, exactly do you mean by that?
Google iPhone DFU mode. Put the phone in DFU mode and restore it.

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In preparation for upgrading from Leopard 5.8 to Snow Leopard I backed up my entire macbook system to an external hard drive. Then I deleted some files prior to installing Snow Leopard but I accidentally deleted the systems files. I can't boot the system now. How do I resolve the situation?

Thanks for the reply.
The backup was via Time Machine.
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Hello everyone,
I'm new to mac and i just installed some programs yesterday. Because I have a 64GB MBA I thought I should delete some stuff and I guess I accidentally deleted some system files. Now my MBA doens't operate proper and I can't open anything. Finder crashes all the time and I can't go trough my stuff. I need my schoolstuff back..
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Halit.

I is not my purpose to preach but every user that has valuable data should have a backup. Based on your response I sense that you do not but I suspect you are coming to understand the value of backing up your data.
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The choices that you have are as follows:
1. Try the reinstall as described earlier.
2. See if you can start the MBA in target disk mode and copy data off of the MBA SSD and then perform the reinstall.
http://support.apple.com/kb/PH10725
3. Get data recovery software and try to get the data on another storage device.
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Deleted a system file, now nothing works

Hi,
I downloaded and used a 3rd party file that changes the login window UI, but decided yesterday I wanted it back to normal, I had a backup of the original file already in the directory, so I deleted the file and double clicked the zip file (thinking stupidly this was it done).
But it appears I've deleted the file and the file didn't unzip and now my mac won't boot up at all, it's stuck in an endless blue screen loop at the login window.
The directory is - System/Library/CoreServices/SecurityAgentPlugins
and the file itself in that folder is - loginwindow.bundle
So I've completely screwed things up, here is the things I have tried and failed:
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I was hoping I could archive and install from the OS DVD, but for some reason it doesn't seem responsive (blank white screen, or at one point just shutdown my macbook).
All because of one system file?
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If you're unable to boot from a Mac OS X install disk, there are a few possible reasons:
1) The disk is damaged
2) The disk is not appropriate for the computer
3) The optical drive is damaged
4) There's some other hardware problem
5) The hard drive is so badly corrupted that you can't boot from anything (rare, I've only seen a confirmed case like this once)
6) You have a peripheral connected that is interfering
If #1 is the case, there's not much you can do but replace the disk. In the case of #2, note that gray disks that shipped with a different machine won't work and that [you can't install an older system than what shipped on your machine|http://support.apple.com/kb/HT2186]. #3 is probably only diagnosable (is that a word?) if your system is working (so you can test other disks) or if Apple takes a look at it. #4 can be tested with [Apple Hardware Test|http://support.apple.com/kb/HT1509], if you can manage to boot into that. And #5 can be difficult to fix, usually involving the assistance of another machine (for example, you could boot in [FireWire target mode|http://support.apple.com/kb/HT1661] and try repairing with something like [DiskWarrior|http://www.alsoft.com/DiskWarrior/index.html] or just erase the drive). Finally, #6 is easy to test - just unplug everything but the keyboard and mouse and test again.
Since fsck reported errors on your drive that had to be repaired, #5 could be possible, but then I would think it wouldn't boot into single-user mode. Try going back to single-user mode and keep running fsck repeatedly until no problems are found (or until you're reasonably sure they won't be fixed).
Unfortunately, since we know your hard drive was damaged, you may have already lost everything on the drive if you didn't have backups.

I may have deleted some system files from my computer due to my antivirus and now my imac won't start. Actually it does, and then there is a blank screeen with the apple logo and it shuts down right away. is tehre a possibility of recovering my files?

Hello
I was having some problems with my Imac, for a while it was slow and often disconneceted from my wifi, while this one worked perfectly (tested with other devices)
I thoug i might have a virus, so i downloaded an antivirus (mac keeper) and started checking.
I also did a scan of my computer using Console or something from the utilities, and then a folder popped witha file I had canceled a while ago. I canceled the file and then my Imac continued to be slow.
i then restarted my Imac, but when it started, the usual grey logo of Apple appeared, and then it shut down suddently.
I tried to reboot it holding the command key and R but nothing, and then i tried holding the shift key and a bar appeared, and at half of the bar it sut itself down again.
I think it is probably a preoblem because I may have cancelled some of the system files from a folder called "private" in the "documents" folder.
Is there any way I can recover some of my files? maybe all of them? I hope so because I have some important files there
Is this a thing I can do myself or do Ineed to go to a MacStore to repair it? Will I need to change HD or just to format it and reinstall? also if there is any way i can recover some of my files that would be great.
Thanks
Ludo
P.S. problems appeared when i installed the Mavericks version.

If MacKeeper corrupted the Recovery partition then even I underestimated its potential for damage. Garbage "cleaning" apps will cause misery but I have not found that the Recovery partition to have been affected by using MacKeeper or anything like it. I doubt that it did so, but I have learned not to underestimate the potential for such things to result in system corruption.
Before concluding your Mac has a hardware failure, try booting OS X Internet Recovery by holding command option r on startup (three fingers). That will force your iMac to bypass the Recovery partition altogether, and convey the ability to create a new one.
An Internet connection will be required (wired or wireless).
At the Mac OS X Utilities screen, select Disk Utility. Select your startup volume (usually named "Macintosh HD") and click the Repair Disk button. Describe any errors it reports in red. If Disk Utility reports "The volume Macintosh HD appears to be OK" in green then you can be reasonably (though not completely) assured your hard disk is in good working order.
Assuming the HD remains usable you can then use Disk Utility to erase it. Reinstall OS X, restore your essential software and other files, and don't reinstall the junk.

Can time machine restore system language files deleted by "monolingual'?

I've removed some important language files while using monolingual (namely -English (American) -English (British) not realizing these are subset and required).
I should've read the FAQ first... now some programs are appearing in weird character formats.
Can I replace those files with my Time Machine back ups?
Which folder would I need to replace back with previous file?
Since I did this only late last night, I should be able to just replace a certain system file folder, without causing much headache, I'm hoping!

kacmaz wrote:
Can I replace those files with my Time Machine back ups?
Yes.
Which folder would I need to replace back with previous file?
That's the problem; language files aren't in a central location; each application has it's own set of language files, containing the translations of the messages for that application.
Since I did this only late last night, I should be able to just replace a certain system file folder, without causing much headache, I'm hoping!
I don't know much about Monolingual; I don't know if it removes language files from your System folders, or only Applications. And if you've installed any apps anywhere else, I don't know if it got them, too.
If you're only having trouble with apps, you might be ok to restore only Applications, but to get everything back the way it was, you'd need to do a full system restore, per #14 in the Time Machine - Frequently Asked Questions (or use the link in *User Tips* at the top of this forum).

System files deleted accedently

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