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windows logs off immediately after loggon

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Last Modified: 2013-11-22
after we cleared a virus from this computer we cannot get it to logon without it returning back to the logon screen, this happens in safe mode as well.
Prior to this it would not run any software  " you do not have sufficient rights to run this software" was the message when we tried to run SFC or regedit
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Commented:
Hi  Mainsystems
Have You tried also Last known good configuration?
If yes - You;ll possibly need to connect problematic HDD as slave to any other PC and rescan it and also reset NTFS permissions.
Last opportunity - You may use Repair Installation
http://www.microsoft.com/windowsxp/using/helpandsupport/learnmore/tips/doug92.mspx 

Commented:
Hi,

Your maching may be infected by a spyware. Scan your PC using superantispyware:

www.superantispyware.com

Regards,

Author

Commented:
we have already done that using Webroot, Trend and Mcafee

Author

Commented:
we know that it is a line in the registry possibly  WindowsNT entry that is causing the problem but no one here can remember what or were the line is
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Commented:
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Commented:
after trying the above solutions we are now able to logon, but still cant run any software the error message is " windows cannot access the specified device, path,  or file, you may not have the appropriate permissions to access the item"
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Commented:
Cant run certain File Types, or is it really ANYTHING? Could you be more specific?

Does Safe Mode now work?
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Commented:
work any better, in regaRDS TO THE FILE ASSOCIATIONS?

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Commented:
I would do a few things....Install and update Super Anti Spyware and reboot to Safe Mode.

Then do a full scan, and see what it finds. Then you can even do an Online Virusscan for Housecall if you use Safe mode w/ networking.

SUPERAntiSpyware.com - AntiAdware, AntiSpyware, AntiMalware!
http://www.superantispyware.com/
One of the best on the market (and it is free, although you can upgrade and get Real Time Protection)

AVG Anti-Virus Free Edition
http://free.grisoft.com/doc/download-free-anti-virus/us/frt/0
Excellent Virus Scanner, with the best price.

Housecall Online Free Virus Scanner
http:\\housecall.trendmicro.com
Great to do an online Scan in Safe Mode w/ networking
Mohammed HamadaSenior IT Consultant
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Commented:
policy is messed up there you should try to log on to safe mode on administrator account and see if there's away to run any programs?
From what I read your machine was infected and it has corrupted certain sections of your registry tree.
Also when you cleaned it up the antivirus deleted certain operating system files which were renamed by the virus.

Your best bet is to save all your data as you can log on now and then reinstall the machine. I know this is the lay man solution but with windows to work better and when you have save d your data this is your best bet.

In case you do not have a windows xp cd then we have to check the registry entries in a lot of places.

Download SDfix from :http://downloads.andymanchesta.com/removaltools/sdfix.exe and run it in safe mode with administrator rights. Also run SAV32CLI from the SDFix utillity and report back to us on what viruses were found. We might be able to help you in restoring the registry by knowing what viruses are infecting you.

Commented:
This machine has obvioiusly been badly compromised. You could spend the next six months chasing down gremlins and still not get them all.

Back up the important data, flatten it and reinstall from scratch.
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