i just want to stop people from opening it
Either uninstall the programs, password your entire system, or download some sort of software that locks executables.
Or... if you could be more specific as to what it is you're doing, we might be able to help you better. What programs? Who exactly are you trying to keep off? If it's someone who uses the computer regularly, you could create their own user account. There are lots of way to do what you want to do, but it all depends on what exactly you're trying to accomplish.