"Wake on LAN" or "Wake on Link" can sometimes do that. Open Device Manager, then check the "Properties/Advanced tab" of the "Network Adapter" devices.. If the "Wake on Link" or "Wake on Settings" items are enabled, try disabling them both.
Another place to look if the above doesn't help....Many BIOS settings also have the "Wake on LAN" that can be disabled..
Hope this helps.
Well not sure this is the right section for this, but here's the problem. Recently my laptop I got for like over a year now, keeps waking up by itself when I put it to sleep/stand-by mode. Not sure exactly why that keeps happening. Can anyone explain to me and possibly a solution for it? Thanks~~