My wife's computer (Win7) currently has two mice attached and appears to work fine with either.
John, that's good news; at least it means the system does not get confused.
But are they both wireless?
I did think about connecting in a wired-mouse, which I have in my shack, but then reasoned that would still not tell me if two wireless devices would work without getting "crosstalk"; I have no idea about the technology that makes a wireless-mouse work.
Anyway, I just decided to buy the Logtech M570 (it's wireless); if it won't work with the wireless-mouse on the home-computer, I'll use it in the shack.
73 Jerry KM3K