My sisters computers keeps constantly stalling for no apparent reason. The computer can be idle and will freeze or you can be in the middle of a task and it will freeze, the only thing that resolves this is a restart. On restart though you can log in and it will freeze up straight away (but this is not always the case). I have even had it freeze in safe mode.
I have run three versions of spyware (spybot, adaware & spysweeper) on it as I thought there may be a threat but still cannot resolve this issue.
Has anyone got any suggestions?