Is there any software that will log when a machine enter a sleep state or resumes from a sleep state? I recently enabled WOL and I think the machine wakes up all by itself.

Thanks all.

Assuming WOL mean Wakeup on LAN, that's quite possible. esp if your on an "Always on" internet connection because (as I understand it) when your LAN card receives traffic, it waked up the computer. the internet will send you traffic at random intervals, normally blocked by firewall/security software. Something as simple as a random ping would wake it up.

I think there is a logger for network traffic which is the closest thing I can think of for the type of logger your are looking for is simply a network traffic logger.

(If I'm wrong please correct me )