Control several PCs using one keyboard

Synergy fixes this problem by letting you control up to 15 computers on the same network using only the keyboard and mouse of your main computer.

1. Download and instal Synergy on two PCs you want use. When the ‘Server or client?’ window appears A choose Server B on the main PC (the one whose mouse and keyboard you want to use to control both computers)and select Client C on the second PC. Click Finish. D  When prompted to activate Synergy click Cancel, then Yes which just means youcan use it for free with out license On the Client (the second PC, which you want to control with the main computer’s keyboard), make a note of its screen name, E as listed in Synergy. 
   
2. On the Server click ‘Configure server’, click and drag the new computer icon to mimic the position of two mwchine on your desk A. Double click the Unnamed PC and give it the screen name you noted down earlier. Click OK, then OK again . Enter the IP address of the Server inthe box on client screen B Click Apply C And Restart Your both Mechine. You can now move your mouse off the left or right edge of the Server screen (depending on the positions you set up in step  and control the Client 
   
3.  AFTER MOVING YOUR CURSOR ON THE CLIENT MECHINE you can use your keyboard to control it. You can add as many Client PCs as you like by following the instructions in Steps 1 and 2. On the Server, click Configure Server and ‘Advanced server settings’. A