Form time to time, my system just locks up, with a Blank Screen.
No error message and nothing is written into the even log.
So far it happen in Second Life.
Opening Outlook Express
Opening create new mail in Outlook Express
Yet I can play DVD and games (Crysis, C&C 3, Forged Alliance) without trouble
Running a 2.4 Quad, 2gig of ram, GA-X38-DS5 MB, 2x ATI HD 3850 i(crossfire)
Windows is fully updated
DirectX 9.0C (4.09.0000.0904)
Nothing is overclocked, everything is set to defaut (MB and ATI cards)