Windows 7 immediatly waking up after sleep
At home I have set up a new Windows 7 computer and the intention is to put it to sleep mode when we don't use it, to achieve ~5 sec start time. When I set it up, I realized, that as soon as I put it to sleep mode, it waked up. After checking the event viewer, it turned out that it received the wake up signal from the network. Finaly I figured out that on the configuration menu of the Ethernet adapter on the Power Management tab, I had to check that only allow magic packet to wake up computer. This solved the problem immediately.