Instead of just deleting the folder, you should go through the proper procedure for removing the apps, same as for removing any other program or game from your PC. You can do this either by looking for what you don't want in the start menu, then right-clicking it and deleting it; or by going to Uninstall a Program (in Control Panel) and uninstalling it from here. If you just deleted the folder, start menu shortcuts, registry files, and other parts of the app would still be left on the system, only what you deleted would be gone.