I don’t think we know enough.

In the Event Viewer you just get the kernal power entries around the time of the shutdown? Nothing else?

Your specs are fine, but what is the wattage on the psu? Sounds like you got a shit ton of stuff plugged into the PC one way or the other because of your music… but it also sounds like you unplugged everything and tested.

So, you don’t reboot during LoL but everything else you do.

How extensively have you tested this? Like how many (rough estimate) LoL games have you played since upgrading to the new PSU/Vidcard combo?

Did this all start immediately after upgrading?

unplug the kb and then plug it back in.

plus there is an accessibility kb on the login screen. just look for the help button