Mouse Lock can quickly and easily lock your screen and mouse with a few extras including dimming the desktop and killing the task manager.

It does not show your password, which can be a little uncomfortable but it does turn green to let you know the passwords match. Save password and save settings are off by default so watch for those. You can optionally kill the task manager, hide the mouse, dim the screen and more. You also don’t want to be using a virtual or on-screen keyboard.

Failed attempts to enter a password are shown in a log file when you enter the correct password as seen in screenshot #3 below.

Mouse Lock does exactly what it promises simply and easily and runs as a portable application. There are numerous ways to lock your computer but if you don’t want to lock your screen in Windows or install an application this might be the one you’re looking for.

Mouse Lock is Open Source and donations are accepted at the Author's website.