By Default Anyone who is using your PC can uninstall any metro application on your PC by just going to the start screen of your windows8 and right clicking on the App.
But you might not like anyone who uses your PC to uninstall the windows store apps, So here is the way how you can stop users from uninstalling the windows store apps.
1. Open run box and type “gpedi.msc” which will open the local group policy editor.
2. Now Drill down to “User ConfigurationAdministrative TemplatesStart Menu and Taskbar” and click on it , this will bring you up the settings related to Start Menu and Taskbar , Now look for a setting with name “Prevent users from uninstalling applications from Start”
3. Double Click on that setting to turn it on or off , Following is the screenshot once you double click the setting.
4.By default, this option is set to Not Configured. We need to change it to Enabled to remove the Uninstall button from the Start screen.
5. Now this will prevent users from uninstalling the metro apps , the changes should immediately take place but however lets force the PC to update the policies by running “gpupdate /force” command.
That’s all , Now the Uninstall Option goes away and users will not have a choice to uninstall the apps.
If you find these tasks difficult , I have written simple batch files to do the same job, you can download it from here and run them for the same result and changes will take from next log off or restart.