I got this error message: Print processor doesn't exist in my Win 8.1 x64 system.
Per suggestions found on the net, I checked that winprint.dll is present in Windows\System32\spool\prtprocs\x64

Another tip that I've found
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86\Print Processors\winprint
At that registry key, in the right window, is "Driver" of the type REG_SZ and is the "Data" winprint.dll?

In my system the "Print Processor" has no sub-folder. I changed the value to winprint.dll but couldn't find out how to change the type to "Driver". In case somebody tells me that, should I do it in "Print Processor" or should I create a sub-folder "\winprint" ?

Actually, I don't have any physical printer, I'd used and would like to use PDF creators (Adobe, Nitro, Wondershare)

Thanks a lot.