New
#11
Solved it.
I think I finally found the problem.
There's a setting called "System unattended sleep timeout"
However, in Windows 10 it does not show up in the Advanced Power Settings.
I had to add it through a registry edit from here (the Windows 7 regedit works on Windows 10)
http://www.sevenforums.com/tutorials/246364-power-options-add-system-unattended-sleep-timeout.html
So far it has not gone to sleep after two minutes when I wake it with my mouse.
So, it looks like a Microsoft problem, not hardware.