I believe you may be a victim of the 12oz ghost, he has possessed your computer.
In all seriousness, have you tried running it in safe mode and doing a scan?
Also it is always good to unplug the ethernet cable when not in use, now what really
surprises me is your computer being turned on by itself out the blue.
Can you install programs at least? I say get rid of your current antivirus software and installing this
also use the key
S9097868R9097F1106-CRUDS1Y2
If you can install, do an update before restarting the computer, and it will scan your drives while booting. (dont skip this part).