Computer Randomly wakes istelf from sleep mode

[khavens]

So starting last week, my computer will randomly wake itself from sleep mode. Not instantly, but after a few minutes it'll come right back on. One time it woke up and stayed on all night watching youtube videos, because of autoplay, which is not good since I have satellite internet with a data cap. I'm not sure what could be causing this, as I don't think it would be an update because i'm pretty sure it doesn't maintain a connection with the internet while sleeping. Any ideas? Thanks.

 

[geofelt]

Some possibilities:

1. Cat walks over the keyboard.
2. Setting in the bios that allows wake on lan activity.