I'm playing on Windows 10 64-bit, When I try to start any type of map it will let me into the faction selection screen to pick your faction, hero and starting bonus. But during this screen and even after starting the game I keep getting this constant clicking issue and the only thing that does anything is holding down the ALT key which obviously isn't a permanent solution to the problem, If anyone has anything they can think of to fix this it would be greatly appreciated

Thank you so much for the quick reply, It worked so I can finally play my favorite HoMM game :D