The event log isn't necessarily reliable to determine what woke up the computer. When the computer wakes up, many things may start running, resulting in entries in the log. If you are having difficulties with keeping it sleeping, it may be a good idea to check a couple things:
First, I found that if I have files being shared over the network, sometimes it may cause the computer to wake seemingly randomly. You need to check your sleep settings under advanced power options. Under the advanced settings tree, check the "When Sharing Media" entry, and make sure it is set to "Allow the computer to sleep". "Away mode" is a semi-sleep mode that still allows access to shared files and resources. Also go through the other settings and make sure that things aren't allowed to wake the computer up.
If that isn't helpful, also run powercfg /requests
in a command shell running as an administrator. If there are things that are preventing the computer from remaining in sleep mode, this will reveal them. Even simple, seemingly innocuous things can do this. I found that leaving the Line In audio jack set to enable "listening" (so I can play my Xbox through the computer speakers) prevents the computer from entering sleep mode.
The only thing I can think of is that you have scanner attached to your computer and ever night your cat jumps on the scanner pressing the "scan" button ;) – ChrisF – 2011-11-02T16:09:59.497
1Does powercfg -energy find anything? This sounds more like it might be a scheduled task or something, though. – Shinrai – 2011-11-02T16:31:21.543
@ChrisF catscan? ^^ – HaydnWVN – 2011-11-02T16:42:53.977
2did you check the task sheduler? could also be a piece of hardware, e.g. the network card. you can disable the "wake up" feature of devices in the devide manager – weberik – 2011-11-02T17:01:20.647
1I remember my sister's laptop having a similar problem. I think I disabled the BIOS' "Wake on LAN" feature, and that solved it. Might be worth trying. – onnodb – 2011-11-02T18:19:11.003
@Shinrai The result of the powercfg -energy command says "The Power Efficiency Diagnostic library (energy.dll) could not be loaded." – leeand00 – 2011-11-02T19:08:36.823
@ChrisF :) I don't have a cat. I do have scanner, but it's not attached and hasn't been for years. Unless there's some sort of "ghost driver" that I don't know about... – leeand00 – 2011-11-02T19:11:34.403