This PowerShell script will change the drive letter of all CDROM & DVD Drives found starting from whatever is set as $LastDriveLetter variable, working backwards until it finds an available drive letter.
Too many IT Pros leave CDROM/DVD Drives as the drive letter Windows assigns them when first detected, which is typically usually either D: or E:. Then when adding new volumes they choose the next available drive letter instead of moving the CDROM/DVD Drive(s) out of the way. I’m a stickler for this, as I like to see consecutive drives letters used for the logical disks.
The easiest way to ensure all builds are standardised is to run a script during the build process that assigns a new drive letter to the connected CDROM/DVD Drive(s).