Is your computer able to run a virtual machine? To run a virtual machine (or in this case an emulator) hardware acceleration is required. Whether your computer supports virtual machines/emulators can be checked in the BIOS of your computer.
hey its may be because you have not installed emulator properly please check in control pannel weather it is installed or not if yes then you need to adjust the RAM of emulator to 512 mb i do this settings it works for me may be it will for you also try once . ..!!