Keyboard problem (SHIFT keys)

I just got a new HP laptop computer at work. For some reason when I hit both shift keys together at the same time, along with the question mark (?) key, I get the following character:?P
A question mark with a P. The same thing happens if I hit the shift key along with the < or> symbols, but with different letters: OOO?P?P?P?P?P. This is frustrating, because I apparently have always hit both shift keys at the same time when putting a ? in. I guess I can break the habit if necessary, but can someone tell me why this is happening? I had another HP before that never did this, and I have a DELL laptop at home that doesn’t do that either. Your help would be greatly appreciated. Thank you!