Android Studio guest hasn't come online in 7 seconds

Actually 'Cold Boot Now' may work in this situation

I had the same problem. Selecting Cold Boot Now in AVD manager solves the problem.

But I have to open AVD manager each time when I want to launch Emulator and I just want to click on Run app button and select device, without opening AVD manager.

To solve this: open AVD manager -> Edit device -> Show Advanced Settings -> Boot option -> select Cold Boot instead of Quick boot.

tools->Android->AVD Manager

Choose the device then Cold Boot Now