well vista has started to freeze randomly but the only event in the eventlog says "system shutdown at xx:xx:xx was unexpected" with no entries for atleast 5 mins before the time listed in the 'unexpected' event(if that makes sense). anyway it seems to happen most when gaming but everythig is below redline temp wise, power supply is fine and hdd is ok. the only thing left i can think of is its either the os (something like a corrupt file) or the cpu/mobo. any ideas would be great.