very strange keyboard issues

My keyboard has started to act very very funny on me. First thing I noticed was the page down key started opening the My Computer folder when it never had before and I didn’t rebind anything. Page up also now opens the calculator, and the very worst of all is right shift now types in a 3 when pressed 3(I can still use it to capitalize but there is always a 3 first, so I’ve started to have to use caps lock for single key capitalization3)

Left shift does the same thing but it types a 6 instead of a 3. Please let me know what the issue might be or how to reset everything to default binds, I’d really appreciate help with this.