I had an issue when running Mouse Without Borders(MWB) between 2 Windows 10 machines. The mouse would be invisible when on the computer that the mouse was not physically connected to. This is an issue with Windows 10 (and I believe with Windows 8) as it hides the mouse when none are detected. The default solution to this is to enable “Draw mouse cursor” in the “Other Options” section of MWB. When I did this the mouse did appear on the screen and work but… it was HUGE and I wasn’t happy with the result.
The solution I found is to enable MouseKeys. Go to Control Panel -> Ease of Access -> Ease of Access Center -> and click on “Set up Mouse Keys”. Check the box “Turn on Mouse Keys”. Optionally, I unchecked the boxes “Turn on Mouse Keys with left ALT + left SHIFT + NUM LOCK”, Both boxes under “When using keyboard shortcuts to turn Ease of Access Settings on:”, and “Display the Mouse Keys icon on the taskbar”.
Now the mouse looks the way it should… I hope this helps some people.