If anyone can access your computer, either at the office or at home, and would like this not to be the case, you can use a tool like RJL Black Screen to block the desktop from unauthorized users.
RJL Black Screen is a simple and small tool, which can be very useful on certain occasions, because it allows you to lock your computer's desktop, so strangers do not have access to it. The most curious thing about this practical tool is that you can configure the image you want to use when the screen is locked, that is, you can choose the black screen that appears by default in the program, to simulate that your computer is turned off Or, choose a wallpaper or image that you like. In the same way, you can block the mouse options so that it stops working or choose a key with which to block your device completely. If you finally choose this option, you have to know what your device will only unlock by entering that password, so you won't have to forget it.
After the name of RJL Black Screen it hides much more, because in addition to using this application as a security tool, you can also do it to play jokes on your co-workers or floor, causing them to lock their computers when they are not in front of their equipment, for example, when they go to breakfast.Apart from how security measures also its authors have designed it with the aim of spending jokes (for example to coworkers) causing them to block their computers, for example: when They have gone to breakfast.
You can free download RJL Black Screen 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.