First of all, update android studio. Check if the emulators run from the
AVD manager outside Android Studio, I mean by starting it up manually from
ur SDK installation folder (AVD Manager.exe) . Check the path of ur
emulator in .ini file in C:>Users>user-name
>.android>avd. U can make a system variable for ur SDK
folder "ANDROID_SDK_HOME" and place the .android folder's content there
(the whole .android folder). Sometimes "resetting the adb" after u run
emulator may work.