I have a 2 year old Acer laptop which i primarily use for downloading torrents. and thus leave it on for the whole night at times. of late when i wake up in the morn i find that it is shut down on its own although the battery n power lights are always on. the comp refuses to show the desktop. So i have to press dwon the poer button, switch it off and restart the comp again. a message " the comp has recovered from a serious system error" appears. i have a blu screen also a few times. ANy idea what could be the problem. thanks