Office 15 is installed but, "Gone"

hey I had some crash a few days back and upon rebooting it win8 did some automatic repair thing and when i finally got back into the desktop it seemed to have reset a lot of things, including the startscreen icons and the entire office suite too, it's still on the hdd in the program files dir but I need to somehow uninstall it so i can reinstall it? it's not listed in the add remove...