BloKeon is an interesting tool whose greatest virtue is that it is fully portable and, therefore, does not need installation; just by executing it, it is already activated, so it is ideal for carrying it on a USB stick or flash drive.
BloKeon's mission is very clear: when you run it, it completely blocks your computer, being unable to do anything on it; It is ideal for when you are absent and do not want anyone to touch your team. Of course, to unlock it you simply have to enter the corresponding password that you previously indicated.
BloKeon is totally free.
You can free download BloKeon 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.