I tried last known good config earlier with no success.
See if any of this helpshttp://support.microsoft.com/kb/315341
If you think it's a virus, since you have another computer http://www.techmixer.com/free-bootable-antivirus-rescue-cds-download-list/Start with the BitDefender, have had the best results with it.
I've fixed this at least a hundred times.Insert the original Windows XP CD (Windows XP with Service Pack 2 is preferred, but not required) and reboot the computer. You may need to configure your computer to boot from the CD-ROM drive.When the Windows XP Setup has started, press "R" to "repair the Windows XP installation using Recovery Console".Select the Windows installation to repair (generally this is C:\Windows) by typing its number and then pressing ENTER.Type the Administrator password and press ENTER.Type the following commands:D: [ENTER] CD I386 [ENTER]EXPAND USERINIT.EX_ C:\WINDOWS\SYSTEM32 [ENTER]NOTE: If your CD-ROM drive has a different letter assigned to it, enter "X:" instead, where X is the appropriate drive letter.After entering "EXPAND USERINIT.EX_ C:\WINDOWS\SYSTEM32" you should see the text "1 file(s) copied", in which case all went well.Remove the Windows XP CD, type "EXIT" and press ENTER to restart your computer. You should now be able to log on as normally.# Update your virus signature files using the Updater component.# Replace the original USERINIT.EXE (acquired from the Windows XP CD) with the latest version included in Service Pack 2.If this does not fix it, let me know there are other ways to fix it. As well there is a way to create a temporary partition to protect your data while you move it to something else.
Quote from: shdwwlk on December 31, 2009, 05:18:15 PMI've fixed this at least a hundred times.Insert the original Windows XP CD (Windows XP with Service Pack 2 is preferred, but not required) and reboot the computer. You may need to configure your computer to boot from the CD-ROM drive.When the Windows XP Setup has started, press "R" to "repair the Windows XP installation using Recovery Console".Select the Windows installation to repair (generally this is C:\Windows) by typing its number and then pressing ENTER.Type the Administrator password and press ENTER.Type the following commands:D: [ENTER] CD I386 [ENTER]EXPAND USERINIT.EX_ C:\WINDOWS\SYSTEM32 [ENTER]NOTE: If your CD-ROM drive has a different letter assigned to it, enter "X:" instead, where X is the appropriate drive letter.After entering "EXPAND USERINIT.EX_ C:\WINDOWS\SYSTEM32" you should see the text "1 file(s) copied", in which case all went well.Remove the Windows XP CD, type "EXIT" and press ENTER to restart your computer. You should now be able to log on as normally.# Update your virus signature files using the Updater component.# Replace the original USERINIT.EXE (acquired from the Windows XP CD) with the latest version included in Service Pack 2.If this does not fix it, let me know there are other ways to fix it. As well there is a way to create a temporary partition to protect your data while you move it to something else.Shdwlk-This is the same solution that I had found on line but I went ahead and tried it again anyway per your exact instructions. The only thing I saw slightly different when I did this was that when I used the "EXPAND" command the text came back "One filr Expanded"instead of one file copied.However.... is still didn;t work. When I rebooted and then selected my user at the welcome screen, I actually saw my wallpaper for about ten seconds or so and then it logged me right back out.Thanks for you r help though and any additional help to fix it is greatly appreciated!
I got a Sony Vaio with Win 7 about two weeks ago. I went to log on, and I was hearing this "clicking" sound. Then, I got this message, "Operating System Not Found". Drat! Of course, I didn't make backup disks, but my personal files have been backed up. So, it'll be going into the shop in the morning. What a drag! (And I do run AVG, Adaware (Malware bytes), and use ccleaner every day, so I don't know what happened. :-(