Lock your PC and go safe, even logging unlocking attempts, with Lock PC Now
Lock PC Now is an easy to use tool for a quick lock of the computer. The program shows a black screen and disables Windows hot keys.
You can lock your PC using a hotkey or from the system tray.
To unlock the computer you must enter the correct unlock password.
A nice feature is that Lock PC Now can log invalid password entry attempts, which means that you know if someone tried to use your PC.