Hide the "Add a program from CD-ROM or floppy disk" option
User Configuration\Administrative Templates\Control Panel\Add/Remove Programs
Removes the Add a program from CD-ROM or floppy disk section from the Add New Programs page. This prevents users from using Add/Remove Programs to install programs from removable media.
If you disable this policy or do not configure it, the Add a program from CD-ROM or floppy disk option is available to all users.
This policy does not prevent users from using other tools and methods to add or remove program components.
If the Hide Add New Programs page policy is enabled, this policy is ignored. Also, if the Disable media source for any install policy is enabled, users cannot add programs from removable media, regardless of the setting of this policy.