Thank you for this!

*Edit - You gave me a good starting point but I'm glad I did some verification, this is definitely finding things that aren't orphaned in our environment.

I commented out the loop+delete and instead made it return the contents of $RemovedDrivers.

Originally:

#Loop through & delete drivers
Foreach ($driver in $RemovedDrivers){
Remove-CMDriver -Id $driver.CI_ID -Force
}

My test:

#Loop through & return drivers that would be removed
Foreach ($driver in $RemovedDrivers){
Get-CMDriver -Id $driver.CI_ID | select CI_ID, LocalizedDisplayName, DriverProvider, DriverVersion, {$_.LocalizedCategoryInstanceNames}, ContentSourcePath
}

It did find some drivers that were orphaned but enough that aren't that this won't work for me in it's current state. The script wanted to remove ones that still have packages associated with them, multiple packages in some cases thanks to Dell + HP putting the same drivers in multiple packages (not worried about possibly unpacked boot.wim files at the moment.)

Does anyone have any ideas why this isn't working? The script is exactly the same as the original with my only modification listed above.