This is your culprit:
Errors, Source, System Error, Category 102, Event 1003
Since you've done a rebuild, it strongly suggests you have a hardware problem or a driver issue. This article should help. RASMAN is nothing to worry about, it's windows remote access control manager. Definitely not your crashing issue.
The computer may automatically restart, or you may receive a "serious error" message or a Stop error message in Windows Server 2003, in Windows XP, or in Windows 2000