I downloaded synapse 4

I downloaded synapse 4 for the black shark headphones I bought and then it says it needs to restart my pc so it does and now my mouse and keyboard don’t work at all only in bios setting they work my mouse is a death adder v2 and the keyboard is a generic keyboard I can’t boot into safe mode because my keyboard and mouse don’t work it had bricked my pc since no bother things work I’ve tried a different wired mouse and it doesn’t work still