This settings were already there. It's not the machine wakes up right after putting it manually in standby. It won't go to standby automaticly.I have had the same problem in Windows 7. The way to fix it is to go to your network card properties (NVidia in my case) and make sure that Wake on pattern match is disabled under advanced tab and under power management tab checked the box Only allow a magic packet to wake the computer.
Let me know if this work for you.
Can you manually put it in sleep mode with by assigning a hardware button in the power control panel? If it sleeps that way without error then Orbital Shark is on the money -- you've got something running likely something like uTorrent:
View attachment 8700