In Documentation Microsoft suggest to run the following command to see which Acceleration you use:
"C:Program Files (x86)Androidandroid-sdkemulatoremulator-check.exe" accel
Also make sure you use a recent Windows 10 Build, the Hyper-V Platform only works since Version 1803, but not in older Windows 10 Versions.
If you still have issues, follow the Microsoft documentation, it shows a lot of tips.
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