It’s funny how much real estate goes to waste on a full-sized keyboard. The numpad takes up a big chunk of space, yet for many of us, it serves no real purpose. Sure, it’s indispensable for anyone who ...

Don't know if it will work with a USB numpad, but there's a freeware program called Sharpkeys that I use on my laptop to make the Capslock key into a Windows key. It might do what you're looking for.