I use multiplicity on one computer and one laptop. Computer (Primary) is with Windows 7 32-bit and Laptop (Secondary) is Windows 10 Pro 64-bit. I use ROCCAT Tyon mouse and before few days ago i upgrade my Laptop from Windows 8.1 64-bit to 10 Pro 64-bit. Problem is this now i play TERA on laptop and when i login into the game my scroll on the mouse is not working before when my laptop was on Win 8.1 is working, but not now. I check all firewalls setups and they are identical with suggested one, but i am using and AVG, so check there too which was suppose to work. On both machines my mouse driver is installed. And to be sure there is problem i try my scroll on different game and there was working, every where on my secondary machine my mouse is working - web, apps and etc., only on TERA is not working!
Is this app specific - that it only happens on the Secondary with that game - scroll works with everything else? Does it work if you plug the mouse directly into the Secondary?
You should ensure that the mouse software is installed on each PC - if it needs to detect the mouse for that to work, plug it in to the Secondary to do so.
Stardock Support Manager