Sorry to necropost. I seem to be having the same exact problem. Remove does not work, nor does removing it from the "Programs and Features" menu of the control panel. I too have no option to reinstall or repair.
Is it possible that I need to manually add the files back? If so, can someone who uses the H2100 post a zip of their "C:\Program Files (x86)\corsair\Corsair Gaming Headset Software\" directory so I can give this a try? My only other option seems to be a reinstall of Windows. I really want to avoid that if possible, but I will not hesitate if that is the only option.
Thank you in advance.