Un-pair PS3 Controller?

Does anyone know how to un-pair a Sixaxis controller from a PS3? I want to use one of my unused controllers on my computer, but every time I push the PS button to activate the controller, it turns on my PS3.

I’ve tried the reset button on the back of the controller, but it didn’t do anything except turn the controller off. Help!

When I have my DS3 hooked up via USB I don’t have to press the PS button. The computer sees the plugged in controller just fine. If I do however press the PS button, the controller switches over and turns on the PS3 and only takes power from the computer. I don’t have BlueTooth on my computer so if you were talking about using it wirelessly, I am not sure how to do that.

Unplug your PS3 when you go to use the remote on the computer.