My wife's HP Windows 7 Pro 64-bit tower will go to standby, monitor goes black, light on the tower goes from blue to orange. Then after about 5-10 minutes of being in standby, it wakes itself up and brings up the login screen on the monitor. I have looked at all the power settings I can find in the OS but I cannot find out why it wakes itself up. It gets a bit annoying when it wakes itself up since it is in the living room and it suddenly spins up and lights up the living room. Any ideas on why this happens?