This is really Cool…
Mouse without Borders is a prototype that makes you the captain of your computer fleet by allowing you to control up to four computers from a single mouse and keyboard.
This means that with Mouse without Borders you can copy text or drag and drop files across computers. You load a small program on each of your computers, then you can copy text or drag and drop files across computers
This APP is a Side project of a Microsoft employee
The download the APP click HERE
For support see this site