Both my mouse and my keyboard have that box checked to allow this device to wake the computer, but neither does it. It's like it enters a deep sleep, like hibernation, but I have hibernation disabled.
Sorry. I didn't write it down. I was just seeing if support came up with the same solution that worked for me, but it did have something about allowing windows to turn off the cpu device. I did some searching and could not find it.
I had a very similar problem on my brand new computer. When it went to sleep, it would power off after awhile. I fixed it by turning off automatic restart and hibernation. I think hibernation was my problem. MSI support recommended going into Device Manager and turning off "Let windows power...