Hide Add New Programs page
User Configuration\Administrative Templates\Control Panel\Add/Remove Programs
Removes the Add New Programs button from the Add/Remove Programs bar. As a result, users cannot view or change the attached page.
The Add New Programs page lets users install programs published or assigned by a system administrator.
If you disable this policy or do not configure it, the Add New Programs page is available to all users.
This policy does not prevent users from using other tools and methods to install programs.