winxp

Have you tried to boot pressing F8 and choosing "Use last good known configuration"?.
Also you can try to boot from the Windows Installation CD and choose Repair option if the first option doesn't work.

Hope this helps!

Did your client install any software prior to these events occuring? If so, that is most likely your suspect. Boot into safe mode and remove it.
Now, I have, unfortunately, seen something like this before. I believe it was a virus/trojan. Not sure. I had gotten, and please don't laugh, a file from kazaa (*sigh* I know, bad boy!) upon executing it, both my antivirus and firewall programs were disabled and my cpu was taken to 100%. Once I found the service that was using 100% usage, I attempted to just end it, well, it came right back, using IExplorer.exe to execute it. I also located the files behind it, but obviously couldn't delete them due to them being in use. So, what ya have to do is rename temporarily your iexplorer.exe to something else. End the process, bingo it can't restart. Then just delete the bad files. Now you can rename your iexplorer.exe back to normal and reboot. All worked fine after that. During this whole situation, I did get the 'serious error' and couldn't browse anything. Hope this helps.

Woody

Ok.

1. Boot into safe mode.

2. Disble system recovery.

3. Run http://vil.nai.com/vil/stinger/ (free program from mcafee for high risk virii.

4. Reboot, download latest service packs for windows... keep rebooting and updating until complete.

5. On final reboot, run stinger again, enable system recovery.

I agree with answer #3. Not trying for any points here--just commenting on jschein's answer. If you have an active virus, many times it will disable new antivirus installs. I saw similar problems with a Blaster infection. You may need to disable the RCP service--for Blaster tool, see:

http://securityresponse.symantec.com/avcenter/venc/data/w32.blaster.worm.removal.tool.html

You need to disable Restore or the virus just hangs around in the backup. You also have to disable viral processes. The Stinger and Blaster tools will check and stop any virus processes so you will be able the get a "good" scan for viruses. Make sure to scan with most current signatures. I would also suggest pulling your internet connection while cleaning the system so a virus won't try to sneak back in until you complete the scans and setup good realtime protection. If all else fails, re-install (I think that is quote from Microsoft Support!). Anyway, the client coundn't have built a lot of data over 3 days. Good luck!

Sorry guys but i discovered the problem was.....................memory!!!!

Changed and everything is fine.

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