Help! Logonui.exe error keeps Win 7 from starting!

Question

I was hit by the Netsky virus last night and after cleaning my system, I ran into the following (approximate) error trying to start Windows 7 normally:

"Logonui.exe - The application was unable to start properly.  Memory at #0000005 could not be read."  My only option is OK, which leaves me with a blank grey screen and the mouse pointer...forever!

I'm able to start in Safe mode (thank God) with networking so at least I can get my files transferred off the C: drive, but I'd like to avoid rebuilding the drive if I can. 

Does anyone know how I can either a) repair or b) replace the Windows 7 version of logonui.exe?  I couldn't find the file on my Win7 install DVD (there is a copy in C:\Windows but presumably that copy is now corrupt).

I've tried all the fixes I've found online so far, to no avail. Thanks a million to anyone who can help.  Contact me here or at *** Email address is removed for privacy ***

Best,

DwC

Answer 1

Hi acoustictherapy,

I would suggest you to perform Startup Repair and check if the issue is resolved.

Startup Repair is a Windows recovery tool that can fix certain system problems that might prevent Windows from starting. Startup Repair scans your computer for the problem and then tries to fix it so your computer can start correctly.

Startup Repair is one of the recovery tools in the System Recovery Options menu. This set of tools is located on your computer's hard disk and on the Windows installation disc.

1.      Remove all floppy disks, CDs, and DVDs from your computer, and then restart your computer using the computer's power button.

2.      Do one of the following:

o    If your computer has a single operating system installed, press and hold the F8 key as your computer restarts. You need to press F8 before the Windows logo appears. If the Windows logo appears, you need to try again by waiting until the Windows logon prompt appears, and then shutting down and restarting your computer.

o    If your computer has more than one operating system, use the arrow keys to highlight the operating system you want to repair, and then press and hold F8.

3.      On the Advanced Boot Options screen, use the arrow keys to highlight Repair your computer, and then press Enter. (If Repair your computer isn't listed as an option, then your computer doesn't include preinstalled recovery options, or your network administrator has turned them off.)

4.      Select a keyboard layout, and then click Next.

5.      On the System Recovery Options menu, click a tool to open it.

For further information, visit the below mentioned link:

http://windows.microsoft.com/en-US/windows7/Startup-Repair-frequently-asked-questions

http://windows.microsoft.com/en-us/windows7/What-are-the-system-recovery-options-in-Windows-7

 Hope this information helped!

 Thanks and regards,

 Fouzan – Microsoft support.

 Visit our Microsoft Answers Feedback Forum 

 http://social.answers.microsoft.com/Forums/en-%20US/answersfeedback/threads and let 

 us know what you think.

Answer 2

Thanks very much for responding.  I actually did try the Startup repair first off, but it didn't resolve the issue.  In the event, I just reinstalled Win 7 - it was the least time-consuming alternative at that point.

All the best,

DwC