I'm on a desktop

My keyboard key mapping is completely messed up after i updated to 10from w8. when i press number 3(not numpad) it opens a windows explorer screen, number 8 turns the numlock on/off , number 7 doesn't work etc
the keys also type their numbers so it's like they are mapped to more than one input

does anyone know of a fix to this?

it's something like this but i'm on a desktop...

Keyboard not working properly after installing windows 10?