I have a HP pavilion dv2550se laptop with WIndows Vista Home Premium installed. For some reason it freezes randomly, I cannot move the mouse or anything. I already did a memory test and it passed. I have been monitoring the temperature and it has reached 86 C which I think is the maximum but it goes up and down. It also freezes on safe mode. I have ran combofix and in some folders it gives me a permissions error even though I run it as administrator. I have webroot installed (latest version) and after some time (and only cookies found) the computer freezes, it has never finished scanning. I already updated Bios and wireless versions, windows updates. What else can I try or what could be causing it to freeze?