Keyboard key/charcater runaway (endless repeat) -- nearly giving up -- fix it

I'm having this exact issue! I can't find anything on the internet to help me, I thought this was a one of a kind issue thank god it isn't. 

For me it's the 3 key, and it actually changed from the 4 key originally. After about 30 minutes it just starts typing for no reason. Nothing in event viewer that could be related to it, no symptoms, nothing. I have to restart my PC for it to go away, and recently I've had to do 2 restarts back to back in order to stop it since it continues on my lock screen, making me unable to log in. 

I've done everything I could think of, and anytime someone tries to help all they tell me to do is get another keyboard. So I did. It's still here. It's not a keyboard issue, I've ruled that out. All I've been doing is going through every single driver I could have missed or corrupted and manually re-installing them. 

I've also been having another issue that may or may not be tied to it. Every once and a while everything USB connected disconnects momentarilly, my screen (as I am usually gaming when I notice this) lags and becomes choppy, and then after like 3 seconds it all goes back to normal. There is always one thing in event viewer that pops up when this happens. An information thing from BTHUSB with event ID 18, task category none. It says "Windows cannot store Bluetooth authentication codes (link keys) on the local adapter. Bluetooth keyboards might not work in the system BIOS during startup." I'm not sure if they are related but it is possible. 

This has been happening since I built my PC a couple months ago, and I installed windows 11 via USB drive my Uncle bought me (new) from best buy. 

Truly any tips would be wonderful because I'm at a loss.