kernel-ranchu Error you will receive in Andriod studio 4 version 12:38 PM Emulator: emulator: ERROR: This AVD's configuration is missing a kernel file! Please ensure the file "kernel-ranchu" is in the same location as your system image. 12:38 PM Emulator: emulator: ERROR: ANDROID_SDK_ROOT is defined (C:\Users\Ram\AppData\Local\Android\sdk) but cannot find kernel file in C:\Users\Ram\AppData\Local\Android\sdk\system-images\ sub directories 12:38 PM Emulator: Process finished with exit code 1 Solution : Go to the following path C:\Users\Ram\AppData\Local\Android\sdk\system-images\android-21\google_apis\x86 change the folder name from Kernal-qmew to kernel-ranchu