A few months ago I did a clean Vista Business install on a new hard drive on one of my office computers. I leave the computer on all the time. Occationally, after being on overnight, we will find the computer in hibernation when we arrive in the morning. I have checked to confirm that Vista is not set to go into hibernation at all. I have checked the bios to confirm that it is not set to send the computer into any type of hibernation. It happens intermitantly. To get it out of hibernation, I must hold the on/off button for a few seconds to get the machine to re-boot. After re-boot it takes a long time for the hibernation message to show then another long time for the passwork box to show. Of course, Microsoft telephone technical support was unable to help. This machine is connected to a usb scanner, a usb printer and a usb fax-modem. It is on a small peer-to-peer network. It does not share any of its drives to any other computer on the network but does have access to other drives on the network. How do I prevent Vista from going into hibernation on its own?