microsoft[.]com/en-us/download/details.aspx?id=35460
answers.microsoft[.]com/en-us/windows/forum/windows_10-start-win_desk/mouse-without-borders-setupuser-guide-tips-tricks/0523308d-3406-4273-b86e-bef28aa6b50d
From the Microsoft Garage, Mouse without Borders lets you use your mouse across multiple PCs or laptops -- you just move the mouse from one screen to the next, same as if you were using two or more monitors. And the keyboard follows the mouse, so whichever device the mouse is working on, the keyboard works there too. It also lets you copy & drag/drop files from one PC to the other.