import-n-reset-user.ps

# Function to change the default user
Function WSL-SetDefaultUser ($distro, $user) { Get-ItemProperty Registry::HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Lxss\*\ DistributionName | Where-Object -Property DistributionName -eq $distro | Set-ItemProperty -Name DefaultUid -Value ((wsl -d $distro -u $user -e id -u) | Out-String); };
# Usage
# WSL-SetDefaultUser <DistroName> <UserName>

$title    = 'WSL Import'
$question = 'The current Ubuntu WSL system will be unregistered, and the new VHD imported. Are you sure you want to proceed?'
$choices  = '&Yes', '&No'

$decision = $Host.UI.PromptForChoice($title, $question, $choices, 1)
if ($decision -eq 0) {
    Write-Host 'Continuing with deregistration of Ubuntu, and import of replacement VHD'
    wsl --unregister Ubuntu
    Write-Host 'Importing VHD...'
    wsl --import Ubuntu D:\VMs\WSL\Ubuntu\ D:\Temp\ubuntu.tar --version 2
    Write-Host 'Setting default user...'
    WSL-SetDefaultUser Ubuntu tony
} else {
    Write-Host 'Operation canceled.'
}