Are you reporting each failure to Dell each time?

I find owners of many machines have problems during the warranty period but wait until the machine fails then it is out of warranty and they exclaim "I've problems since I got the machine."

The records however are clean and the claim is denied.

http://support.microsoft.com/kb/894278 tells of a TROJAN that can cause this. Read advice from Grif at http://forums.cnet.com/5208-6122_102-0.html?threadID=328220#2968150
Bob