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Removed viruses and now Data Execution Protection blocks Userinit Logon Application!


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#1 Nate7410

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Posted 09 November 2009 - 04:16 PM

Today I began to suspect I had some serious viruses/spyware on my computer. Whatever it was, it wasn't allowing me to run any virus scans. So I restarted my computer in safe mode and was able to run a complete scan with SuperAntiSpyware. After removing about 50 things, it asked me to reboot my computer.

Upon rebooting the computer, I received a message that Data Execution Prevention had prevented the Userinit Logon Application, and after I closed that message, I was faced with just a black screen. I wasn't able to find any way to load Windows Explorer or anything else.

I have tried rebooting in both Safe Mode and in Directory Services Restore mode but in both cases, I'm told that windows failed to start.

With my other computer I downloaded PC Regedit and burnt it to a CD, and booted my computer from that disc. I was able to check the registry entry for HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Userinit\C:\WINDOWS\system32\userinit.exe, and it appeared to be present and valid.

I don't know what else to do... I've reached the limit of my own knowledge. Please, can someone suggest a fix for this other than reformatting my computer?

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#2 garmanma

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Posted 10 November 2009 - 03:47 PM

If you cannot bootup normally, cannot transfer required tools to the infected machine and cannot download anything while in safe mode, then your options are limited to what security tools you have on your computer. If those tools do not work, then your options become even more limited.

Have you tried using System Restore from a command prompt in Safe Mode to return to a previous state before your problems began?

If that doesn't work. these are links to Anti-virus vendors that offer free LiveCD or Rescue CD utilities that are used to boot from for repair of unbootable and damaged systems, rescue data, scan the system for virus infections. Burn it as an image to a disk to get a bootable CD. All (except Avira) are in the ISO Image file format. Avira uses an EXE that has built-in CD burning capability.If you are not sure how to burn an image, please read How to write a CD/DVD image or ISO. If you need a FREE utility to burn the ISO image, download and use ImgBurn.

Note: In order to use a rescue disk, the boot order must be set to start from the CD-ROM drive. If the CD is not first in the boot order, the computer will attempt to start normally by booting from the hard drive. The boot order is a setting found in the computerís BIOS which runs when it is first powered on. This setting controls the order that the BIOS uses to look for a boot device from which to load the operating system. The default will normally be A:, C:, CD-ROM. Different computers have different ways to enter the BIOS. If you're not sure how to do this, refer to:
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