AskAdmin is a free tool which prevents users running the applications or opening file types (bat, cmd, reg etc) that you specify.

This protection can be removed with a click, or you're able to run the application directly from AskAdmin's interface.

Blocking an individual program is as easy as pointing AskAdmin at its executable. If any user - even an administrator - tries to run that file afterwards, a message explains that they don't have permission.

It's also possible to block an application for a specific user only.

Your block list can be exported for use on another computer, perhaps handy if you want to prevent your children accessing programs on your PC and laptop.

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It's not infallible - at all - but AskAdmin is a simple and lightweight tool which could help control what non-technical users can do on your PC.