Hi. After an update of my Windows 10 OS (Version 1803, OS Build 17134.254) my PDFCreator "disappeared" from my Windows printers. I downloaded the latest version of PDFCreator and still no joy; the Debug function in PDFCreator correctly printed a test page from PDFCreator but NOT a Windows test page (error: The specified driver is invalid, error 0x000007d1).
I called Microsoft and got a Windows software specialist who (for once!) actually knew what he was doing. After just a few minutes of looking at my laptop setup, "Allan" went to the Windows Registry and was able to fix the problem by doing the following:
- Press windows key + R. Type 'regedit' in the Open box, and then click OK.
- Locate, and then click the following registry subkey if it exists: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\PostSPUpgrade
- On the Edit menu, click Delete, and then click Yes to confirm the removal of the PostSPUpgrade registry key.
- Restart your PC (OR run ‘net stop spooler’ followed by ‘net start spooler’ from an elevated command prompt).
All working now (i.e., I can once again access the PDFCreator printer from all my Microsoft Office programmes).