I had a problem, too. And I got solved.
Solution.
Preferences - Tools - Emulator - Launch in a window option try unchecked.
refer to link: https://github.com/google/android-emulator-m1-preview/issues/76#issuecomment-1023563846
Have a good day.
I checked for "intel virtualization technology" in my PC OS BIOS and just enable it...and emulator starts working.
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