Chkdsk Windows 7 trashed permissions

I love a utility that does more harm than good. Heh.

This is the second time that chkdsk has done this to me. Apparently chkdsk wanted to run, and Windows Update automatically rebooted my laptop. By the time I came back to my computer it was too late.

Chkdsk fixed the bad bit. Great. But it actually made things worse by trashing all of the permissions on my laptop. Pretty much nothing works now when I log in. Error messages, no icons... ugh.

I really don't want to reinstall, or to revert to a prior backup (which would have the bad bit and cause this all over again). Is there a quick fix for this? I'm not sure what the permissions on certain folders like ProgramData and Windows are supposed to look like so I don't know if I can just recursively take ownership from C: and then grant myself permission to everything at C:, setting it to have all subfolders and files inherit those permissions.

This is on Windows 7.
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elorcAsked:
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Pradeep DubeyConnect With a Mentor ConsultantCommented:
if you have a system state backup the restore it to the machine.
After that  run a SFC /scannow command (this will need windows 7 CD/DVD) to get back all corrupted system files.
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Peter HutchisonConnect With a Mentor Senior Network Systems SpecialistCommented:
Permissions as as follows.
C: root = System:FC, Administrators:FC; Users:Read,Exe,List
C:\Windows = Creator Owner, System, Administrators, TrustedInstaller: Special; Users: Read, Exe, List
C:\ProgramData = Creator Owner:Special; System, Administrators: Full control; Users: Read, Exe, List.

Not sure what special permissions are needed other than FC.
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Darr247Commented:
> revert to a prior backup (which would have the
bad bit and cause this all over again)
Backed up data should not contain hard disk, MBR/GPT partition, boot sector or file table errors, which is what chkdsk should be fixing.

i.e. If you have a recent backup, I would go with that.
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Adam LeinssSenior Desktop EngineerCommented:
I never heard of such a thing...are you sure your hard drive isn't failing?
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MHMAdminsCommented:
I agree with Darr your "best" options are either going to be a system restore or fresh install.
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Pradeep DubeyConnect With a Mentor ConsultantCommented:
Reinstall is the last option.

run a SFC /scannow command (this will need windows 7 CD/DVD) to get back all corrupted system files.

for the permission, you have to restore from a old backup.
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