Ive had my laptop for about 12 months now, and ive been having a problem for the past week.

Every now and then, my laptop will power down and turn itself off without any warning (its plugged into the power outlet so its not the battery).

Ive got an anti virus and firewall which are updated regulary and i also run software such as spybot S&D, adaware, spy sweeper & The Cleaner every week (and they do pick up the odd spyware but nothing special).

It's driving me mad, any ideas??

Thanks in advance !