Android 5 emulator not responding after few app launches -

Android 5 emulator not responding after few app launches -

i'm using android studio v0.8.9 latest android sdk on windows 7 64-bit. after running app 4 or 5 times in emulator android 5, emulator stops responding , need close , restart it. emulator crashes info:

description: problem caused programme stop interacting windows. problem signature: problem event name: apphangb1 application name: emulator-x86.exe ...

i had no problems other android versions in emulator.

android android-emulator