The way I would trouble shoot this is using Clean Boot
Try running in clean boot mode for a while, if the problem does not reoccour then follow the intructons on the the link under " How to determine what is causing the problem".
Could post the Event Viewer results for this error?
Open Event Viewer by:
click the Start button
click Control Panel
click System and Maintenance
click Administrative Tools
and then double-clicking Event Viewer
If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Edited by ratchet48, 20 December 2009 - 02:00 PM.