Yes, it worked, fantastic !
I don't have a mouse without USB, but well a keyboard. I also changed the plug place for electricity (is it what you wanted, to be honest I have difficulties to imagine why...). So now I have the screen where I can log on 1 of the users. But no mouse...
This is very good news . So you didn't have other USB devices connected besides the mouse and keyboard?
Connect the mouse it should be detected and start working, log on on the system and restart to see if the problem returns.
About the plug, Rshaffer61 suspected of a faulty wall receptacle, computers to work better should have a ground connection, they work without it but sometimes problems arise.