I turned off fast startup. The network adapters(wired and wireless) are both disabled to not wake the pc. If I log out it will sit at the login screen and stay there without sleeping. My next step is...

I have two pc's that are nearly identical. They are both on windows 10 64bit. Initially one would sleep and one would not go to sleep. Pc a would sleep just fine. At 15 mins it shut off the screen...