Just now it threw up a Bad_Pool_Header error msg. I've searched it and several fixes that have been suggested have involved turning off Indexing, which I'll do as soon as I can get to the desktop.

The BSOD error bug check occurs because a session driver does not free its pool allocations before a session unloads. This bug check can indicate a bug in Win32k.sys ...

I'm reposting here since it could be a mobo/ram propblem. This system is a Core2Duo running XPSP2. Just recently there's a series of short beeps shortly after bootup ...