Fix error 0x000006d1 using level 3 print drivers from Samba to Windows 8

Ran across error 0x000006d1 when attempting to add Samba shared printers to Windows 8 systems. The following fixed the issue for me. This may also help for earlier versions of Windows but I've only run across the problem with some (not all) Windows 8 systems.



Basically add (or edit) the following key in the registry:

[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers]
"ForceCSREMFDespooling"=dword:00000000

Then reboot (restarting the print spooler is probably enough but it's easier to have a client reboot the system)