Edit: sorry, my bad, I didn’t see at first you mentioned that USB peripherals weren’t working at all, even in the installer. That’s very strange, it sounds like maybe electrical shorting? Have you installed the IO shield properly?

Unplanned power off suggests to me that it is likely that you have disk corruption. Boot into a Windows installer and go into the recovery mode, choose command prompt, and use the following tools:

chkdsk /f /r

bootrec /fixboot

X:

sfc /scannow

One of those should probably fix it, if that’s the case.

Consider installing a good operating system in the future :p and good luck!