You can use your phone as a keyboard on a Windows PC by using Android apps and PC software. Here is a complete guide on this.

As it turns out, it’s relatively easy to use a tablet or a spare laptop as touchpad for a Windows PC. Fire Max 11 running Bluetooth Keyboard & Mouse ...

If your keyboard or mouse is not working in BIOS, try other USB ports, If this does not work, use these solutions to fix the issue.