Help with non functioning keyboard/touchpad

Note: this surface does not have a detachable keyboard

So my partner is someone who leaves 100+ Firefox windows open, 5 programs up, and never ever shuts down his laptop. After a year or more of this his laptop would take 30 minutes or more to try to boot up, or wouldn't at all so I suggested that he reinstall Windows 11. After that it seemed like the problem was fixed and it would start up just fine, but after a week or so of use, his keyboard and touch pad stopped working completely. He told me that he tried a bunch of fixes, including installing new drivers, and nothing has worked. No idea if these two things are related but I assume so.

I wasn't around to see exactly what he did, so I was wondering if any of you fine people might be able to help troubleshoot. Really hoping his lappy isn't a lost cause