WSL 2 requires an update to its kernel component. For information please visit https://aka.ms/wsl2kernel For information on key differences with WSL 2 please visit https://aka.ms/wsl2 code example

Example 1: update to wsl2

#enable wsl 
dism.exe /online /enable-feature /featurename:Microsoft-Windows-Subsystem-Linux /all /norestart
#make sure windows version is >=2004
dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart
#restart
wsl --set-default-version 2
#if kernal error https://docs.microsoft.com/en-us/windows/wsl/wsl2-kernel

Example 2: windows features windows subsystem for linux not

Enable-WindowsOptionalFeature -Online -FeatureName Microsoft-Windows-Subsystem-Linux

Example 3: switch installed linx to wsl2

wsl.exe --set-version Ubuntu 2

Example 4: The Windows Subsystem for Linux optional component is not enabled.

dism.exe /online /enable-feature /featurename:VirtualMachinePlatform /all /norestart

Example 5: powershell set wsl 2

wsl --list --verbose