Inside that folder were a handful of files ending in .spl and .shd . These were the "ghosts" of previous failed print jobs—the very things blocking the StartDocPrinter call. He deleted every file in the folder. (Note: If Windows says a file is in use, the Spooler isn't fully stopped).
The error on Windows 11 typically indicates that the print spooler is unable to send data to the printer port . This happens when the printer is unavailable, disconnected, or a software conflict is blocking the standard print command sequence. Common Causes a startdocprinter call was not issued windows 11
If the error occurs only in one program (e.g., Adobe Reader): Inside that folder were a handful of files ending in
inside this folder (you may need administrator permission). (Note: If Windows says a file is in
Open and navigate to: C:\Windows\System32\spool\PRINTERS
This forces the printer to use simpler commands, bypassing the StartDocPrinter issue.