Get your PC locked by USB using WinLocker

ever wanted to lock your pc and be the only one to use it , even passwords can't do it for you, well, WinLockr can. you can adjust it to lock your pc, nobody can use the pc until you insert the usb drive.
you need first to set the application to lock with only USB Unlock to do so. and here's a screenshot

and this is how it looks when locked, the mouse and keyboard won't respond (even if the computer will be working fine, the music was still playing when locked. and everything else seemed to do so, that's why i think it just disables the mouse and keyboard )until you plug in the USB drive, i've just tested it. and it's working perfectly.

if you wanna give it a try ,visit the HomePage for download