Ok so, i ran the full ssd diagnostics scan, and all it said in the end was Full Diagnostics Scan completed successfully. Also, i have to mention that another issue appeared yesterday, the color saturation/gamma/brightness just suddenly changes and stays like that sometimes for a few seconds and sometimes for a full hour or more. Another note, in one of the shut down/boot up problems, the pc went to the so called shut down mode, and i opened league of legends and it instantly "booted up". Maybe this will help, i truly hope so.I agree with you that its weird, and I am trying to figure out what would cause it.
I might get some other opinions
Yes, full scan ssd. Need to check hardware as i it feels like its a physical problem. Windows doesn't slowly close down. Could be some hardware thats not answering to the shutdown message and PC sits there in semi shutdown state waiting for it to time out. then it shutsdown.
I am assuming when you reinstalled completely you wiped the drive and started afresh?
Did you turn Fast startup off?
EDIT: So i just noticed that every time i open league of legends my screen changes the contrast/brightness/gamma