Strange problem with Vista. It might be faulty wiring in my house as the house is fairly old but when I set the computer to sleep or even hibernate as soon as I turn off a light in the room or the heat kicks on the computer is "reawakened". In XP when I went into hibernate, the computer was shut down. Anything I was working on was saved in memory. Not the case in Vista. If it was just the wiring in the room, I thought maybe a dedicated line to the computer might help but if the heat turning on has that affect I don't know. Has anyone experienced this? Thanks for any ideas.

Windows Vista Sleep is different from XP in that it combines standby & hibernate as mentioned in the Vista documentation/help. Sleep writes the system state to the hard disk, then goes into stand by. i_XpUser

I'm not familiar with how Vista's Sleep mode works, but normally, you shouldn't use Standby or Hibernate on a desktop machine. I've never found any need for Sleep mode anyway. I just manually configure the Power Options.

I'm not familiar with how Vista's Sleep mode works It works like pausing a DVD player, says HERE. The idea behind sleep is to chisel some money off your monthly electricity bill. How muc do you really save if you burn a nightlight instead of a standard bulb? i_XpUser