Convert existing unbuntu distro to WSL 2

 Windows PowerShell

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PS C:\Windows\system32> wsl -l -v

  NAME      STATE           VERSION

* Ubuntu    Stopped         1

PS C:\Windows\system32> wsl --set-version Ubuntu 2

Conversion in progress, this may take a few minutes...

For information on key differences with WSL 2 please visit https://aka.ms/wsl2

Conversion complete.

PS C:\Windows\system32> wsl -l -v

  NAME      STATE           VERSION

* Ubuntu    Stopped         2