PowerShell – Change Windows CD/DVD Drive Letter

# Set CD/DVD Drive to A:
$cd = $NULL
$cd = Get-WMIObject -Class Win32_CDROMDrive -ComputerName $env:COMPUTERNAME -ErrorAction Stop 
if ($cd.Drive -eq "D:")
{
   Write-Output "Changing CD Drive letter from D: to A:"
   Set-WmiInstance -InputObject ( Get-WmiObject -Class Win32_volume -Filter "DriveLetter = 'd:'" ) -Arguments @{DriveLetter='a:'}
}

# Set CD/DVD Drive to A:
Get-WmiObject -Class Win32_volume -Filter 'DriveType=5' |
  Select-Object -First 1 |
  Set-WmiInstance -Arguments @{DriveLetter='A:'}

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