How to record webcam in stealth ?

[dodgeman21]

I suspect someone is stealing from me. I would like to enable the You cam on both my Win 8 and Win 7 machines and turn the screen off when You cam is minimized and recording, but it will not do it even with the power set to do so at 1 minute as long as You cam is still running and minimized. (battery or on AC). I would put a piece of tape over the buttons that are lit.
I have the built in camera but do have a USB camera which can be used on 1 machine.
Any ideas would be great to pull this off !
Thanks !