can you post the full blue screen info ?DRIVER_IRQL or smthing?
have you looked at temp of CPU
have you tried running a memory test
http://www.memtest86.com/
PEO http://www.peotv.com/
Dialog http://www.dialog.lk/personal/tv/
Sun Direct l BIG TV l Dish TV l TATA Sky l Multi Choice l HotBird l Airtel l TrueVisions http://www.satlanka.com/