Win 8.1, no mouse in the game panel

[Adwark]

Originally Posted by Flyby

Fired the old dog up for giggles and grins, but can't get my mouse to work so as to select missions, options, etc.

I has similar problem. I was reinstall Win 8.1 and when I run game, mouse freeze and not respond. I was deleting all game shortcuts from start screen and desktop, and make new, directly from program folder - problem solved. I has an nVidia GTX 580 with latest drivers and patches for Win 8.1 x64. Screen resolution 2560x1440.
Game version 4.13 with out mods.