I just built a new system, Win7 SP1, and the **** thing will not stay hibernated or asleep. It wakes at around the same time each morning. I have turned off WOL in the BIOS, I have disabled waking for every device which had the option, and I have turned off any software updating services, that I know of. When checking Event Viewer, there's no software or hardware events. The first event, shown below, seems to be the PC checking the time. Could this actually be waking my PC? Log Name: System Source: Microsoft-Windows-Kernel-General Date: 5/8/2011 4:16:16 AM Event ID: 1 Task Category: None Level: Information Keywords: Time ... The system time has changed to 2011-05-08T09:16:16.500000000Z from 2011-05-08T04:41:08.083033400Z. Event Xml: <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event"> <System> <Provider Name="Microsoft-Windows-Kernel-General" Guid="{A68CA8B7-004F-D7B6-A698-07E2DE0F1F5D}" /> ... </System> <EventData> <Data Name="NewTime">2011-05-08T09:16:16.500000000Z</Data> <Data Name="OldTime">2011-05-08T04:41:08.083033400Z</Data> </EventData> </Event> BTW, I have ruled out our cat stepping on the power button, and as mentioned, I have wake by USB/keyboard/mouse disabled.