I want to inform Microsoft that their latest update KB5003637 breaks some basic functionality of absolute position mice and tablets.
Essentially, we use an absolute position mouse (i.e. we give the absolute coordinates of the mouse pointer on the screen). When Windows 10 first came out it did not allow movement of the mouse across multiple video heads.
Microsoft fixed this in one of the first updates to Windows 10.
Recently with - KB5003637 the absolute position mouse will not move across multiple video heads, it is only operable on the main head.
Thanks,
Martin