Well whenever I try and run downloads overnight or when I go to school when I come home my vista is always logged off and everything shut down of course... i turned off the screen saver and all that but still don't know what the problem is
As i said. It sounds like the PC is crashing. I have had this happen to me a few tiems when i was downloading and encoding a DVD. I woke up to see that Vista had restarted. The downloads stopped and teh DVD wasnt burned. So again i suggest check your error logs.