Computer restarting automatically

For the last couple of days, my computer has been restarting for no apparent reason. After restart, it is saying new hardware has been installed and wants the drivers loaded. I have not put in any new hardare. I am seeing a few posts with people having the same issue. I have run Malwarebytes and it is clean. I tried to run OTL and it freezes during the scan. Does it seem like a malware or virus issue? Thanks

Malwarebytes' Anti-Malware 1.46
www.malwarebytes.org

Database version: 4490

Windows 5.1.2600 Service Pack 3
Internet Explorer 7.0.5730.11

8/27/2010 1:01:36 PM
mbam-log-2010-08-27 (13-01-36).txt

Scan type: Full scan (C:\|)
Objects scanned: 186678
Time elapsed: 1 hour(s), 2 minute(s), 40 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 0
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 0

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
(No malicious items detected)

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
(No malicious items detected)

BTW - I am no longer a GPA student and Jay was going to change my status but must have forgot. thanks