If you want to prevent the users of your computer from uninstalling Metro applications in Windows 8, follow the tutorial below.
As a default settings of Windows 8 Consumer Preview all the users have access to all Metro applications. So, other users can also uninstalled the Metro applications installed by you. Though any uninstalled metro applications can be restored back by downloading them from the Windows Store, but still that will be unnecessary bandwidth consuming. Thus, if you want to prevent other users from uninstalling Metro applications installed by you, then follow the steps given below.
1. Press Windows + R to open the Run window. Now type gpedit.msc into that textbox and hit Enter.
2. Now navigate to User Configuration -> Administrative Templates -> Start Menu and Taskbar . Now Find
Prevent users from uninstalling applications from Start. Initially it will be in Not Configured status.
3. Double click on it to open the settings for it. In the popped up dialogue box, click on Enabled and click OK
to change settings.
4. Now you will see the settings is in Enabled status.
Also, you will no longer see the Uninstall in the Start Menu when you will right click on any Metro application.