Why does my Windows computer immediately turn back on after sleep/hibernate?
Problem
After clicking sleep or hibernate in Windows 7, my computer loads for a while and then goes into sleep mode, but not 1 second later it powers back up. The event log has no errors and no warnings appear when it comes back out of sleep/hibernation. Here's my system specifications: Asus P5KPL-VM Windows 7 I believe this is all that's relevant. I've installed the latest chipset drivers, but I'm unable to update my BIOS (but this is another matter; maybe because the motherboard in the V3-P5G31 bundle is different). I've also tried turning off the "Allow this device to wake up my computer" for the network card, keyboard, and mouse -- but this makes no difference. If flashing the BIOS is the only thing that will fix this, then I will create a new question to this effect. Maybe I should change the suspend mode from S3 to S1?
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1 Fix
Fix for: Why does my Windows computer immediately turn back on after sleep/hibernate?
To continue from Nicholaz's answer this reveals some wake events in the event log that I missed out, since they were not errors: To find out what caused your computer to wake from sleep, do the following: Open Event Viewer by clicking the Start button , clicking Control Panel, clicking System and Maintenance, clicking Administrative Tools, and then double-clicking Event Viewer. If you are prompted for an administrator password or confirmation, type the password or provide confirmation. Expand …
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