when i tried to activate remote control on the host app in my android device it says failed to activate product key.
what does it mean and how can i access it
This will be because you have a windows update that has updated your network in someway.
I get this from time to time and I actually got it this morning.
Make sure all pending updates have been done (restart your PC)
Then try again, if it still happens, uninstall TV and re install the useless **bleep** version again ;)