If I had no mouse I would have a problem since the arrow keys, question mark and last letter of the alphabet do not work on the keyboard.
Definitely gives you a problem doing the control-z shortcut key ...
Every been filling out a form, reading a paperback or hard cover book and tried to go backwards by wanting to ctrl-z the page ......
You seem to have a strange montage of hardware issues all of a sudden. You sure one of Darksheare’s rabbits didn’t thump your equipment?