You have a problem whit RAM, set 512 and VM Heap to 16. And the android emulator will work.
The virtualization in Windows doesn't support 1024M RAM.
Or you cand change the config file:
 avd.ini.encoding=ISO-8859-1
 hw.sdCard=no
 hw.device.manufacturer=Google
 hw.mainKeys=yes
 hw.lcd.density=320
 hw.accelerometer=yes
 hw.dPad=yes
 hw.cpu.arch=arm
 skin.name=720x1280
 abi.type=armeabi
 hw.device.hash=-708107041
 hw.trackBall=no
 hw.device.name=Galaxy Nexus
 hw.camera.back=emulated
 hw.sensors.proximity=yes
 hw.battery=yes
 disk.dataPartition.size=200M
 image.sysdir.1=platforms\android-10\images\
 hw.audioInput=yes
 hw.sensors.orientation=yes
 hw.camera.front=emulated
 hw.gps=yes
 skin.dynamic=yes
 skin.path=720x1280
 hw.keyboard=yes
 vm.heapSize=128
 hw.ramSize=1024mb
Cheers,