There are times when we need prevent some programs from running installed on our computer, since they are sensitive applications, with very personal and private information that we do not want to be seen by other people's eyes. If we see it from the point of view of parental controlIt is also very useful, where parents need to prevent their children from having access to certain software not suitable for their ages.
For this reason, blocking applications such as Smart Windows App Blocker, it is always good to have them present in our favorite software repository, in this case we are dealing with a utility that does not need installation (portable) of only 2 MB, so there is no excuse not to download it 
Smart Windows App Blocker As can be seen in the previous screenshot, it is only in English but has an intuitive interface where all you have to do is drag the program to block Or load it, the rest is a piece of cake with a click on the button «Block App«. By the way, you see the result instantly, it will not be necessary to restart the explorer or restart your computer.
The procedure to unlock a program is also simple, you choose the application and another click on «Unblock App«. The interesting thing is that it allows you to do a test with the button QuizApp and thus check if the program has been blocked correctly.
Smart Windows App Blocker It is compatible with Windows XP, Vista, Windows 7, 2008 and Windows 8, in 32-bit and 64-bit versions. Of course, it is 100% free 
Official site: Security Xploded
Download Smart Windows App Blocker