First of all, you need to have a 9 pin RS232 to USB cable. For windows, Install ASCOM platform Install IOptron ASCOM driver and Commander , the latest is v 5.4.7.1 IOptron Commander has itself a fully functional gui to control the mount, by ticking "Mount Panel" first, setup date and time by "Sync from PC Time" next, click "Slew" to select the celestial objects you want to track detailed instructions