Hey i bought new hp probook 4530s .aur ussi shop say aik optical usb mouse bhi liya hai .. Hp invent optical mouse ..ab mujhay samajh nahi aa rahi hai kay ye kaisay install hoga .window 7 home premium ..64 bit system ..usb port per laganay say mouse may light aaa jati hai ..magar sirf built in mouse pad work kerta hai ..ye external vala usb mouse kaisay work karay ga ..plzzzz help needed