Whenever I try to run my AVD it shows the following messages in the lower left hand corner under 'run' :

C:\Users\abc\AppData\Local\Android\sdk\tools\emulator.exe -scale 0.25 -netdelay none -netspeed full -avd com_example_API_21
emulator: device fd:620
HAX is not working and emulator runs in emulation mode
Cannot set up guest memory 'pc.ram': Invalid argument
emulator: The memory needed by this VM exceeds the driver limit.
Error accepting connection, aborting

Please help !!