Hi Harald,
we also got the error 0x000006d1 and had to disable client side rendering (s. Druckerfreigabe, ein wares Desaster ... :-() with RegKey
[HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows NT\Printers]
"ForceCSREMFDespooling"=dword:00000000
Why only W10 needs this setting and W7 works with enabled CSR I dont understand. Bugs, I assume 
Dont know about that other error of Yours.
Kind regards,
Martin