I had Norton 360 on my desktop and Norton Mobile Security on my Samsung Galaxy Tab S. When desktop subscription expired bought Norton Security for 5 devices. Installed on desktop fine. When Mobile expired followed instructions for additional device but before installing Security says uninstall Mobile first on tablet. Tried to do this but uninstall is greyed out on Mobile app and cannot uninstall. Subscription has expired and is now running on tablet on "free" version with limited protection but still cannot uninstall. Any solutions???