Stop installing Unwanted Programs in Windows 7 -Application lock

To enable Windows 7 AppLocker feature follow the steps below.

1.Click on Start2. On search type gpedit.mscNow press enter ,you can see the group policy editor on your computer.3. Click on Windows SettingsWindows Settings present under Local Computer Policy.4. Click on

                          

5. Click on Application Control Policies
You can find AppLocker under Application Control Policies ,click on it.

Here you can configure the rules about the installing programs in your computer by clicking Configure Rule enforcement.