The print processor does not exist: how to fix it in Windows

Applies to: Windows 11 and Windows 10, local USB printers and shared or network printers. You need an administrator account for most steps.

What the error means

You’ll usually see it as Windows cannot connect to the printer. The print processor does not exist when adding or connecting to a printer, or as an “operation could not be completed” message when printing or opening printer properties.

Every printer in Windows is linked to a print processor. Most use Windows’ built-in winprint (the file winprint.dll); some drivers install their own. The error appears when:

• the printer is set to a vendor print processor whose files were removed, often after uninstalling or upgrading printer software;
• the driver being installed expects a print processor that isn’t on the PC;
• Windows’ own winprint registration or winprint.dll is damaged.

Fix 1: Restart the Print Spooler

The spooler loads print processors when it starts, so a restart is the first thing to try after any driver change.

1. Press Windows + R, type services.msc and press Enter.
2. Right-click Print Spooler and choose Restart. If it’s stopped, choose Start and make sure Startup type is Automatic.

Or, in an administrator Command Prompt:

net stop spooler
net start spooler

Try printing or adding the printer again.

Fix 2: Set the printer to use winprint

Use this when the printer is already installed but printing or its properties fail.

1. Windows 11: open Settings > Bluetooth & devices > Printers & scanners, select the printer and choose Printer properties. Windows 10: Settings > Devices > Printers & scanners, select the printer, then Manage > Printer properties.
2. Open the Advanced tab and select Print Processor.
3. In the left list choose winprint, and in the right list choose RAW. Select OK, then Apply.

If the Advanced tab is greyed out, select Change Properties on the General tab first, or open the window as an administrator. If the printer then prints normally, the vendor’s print processor was the problem; reinstalling its software (Fix 4) can restore it, but winprint works for almost all printers.

Fix 3: Check the winprint registry entry and file

If even winprint is reported as missing, Windows’ own print processor registration is broken. Back up the registry key before changing it: right-click it and choose Export.

1. Press Windows + R, type regedit and press Enter.
2. Go to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows x64\Print Processors\winprint. (On 32-bit Windows the environment is Windows NT x86 instead of Windows x64.)
3. Make sure there is a string value named Driver with the data winprint.dll. If it’s missing, right-click the right pane, choose New > String Value, name it Driver and set it to winprint.dll. This is the fix suggested on Microsoft’s Q&A forum.
4. Restart the Print Spooler (Fix 1).

Then check the file itself: C:\Windows\System32\spool\prtprocs\x64\winprint.dll should exist. If it’s missing or the error persists, repair Windows files from an administrator Command Prompt:

DISM /Online /Cleanup-Image /RestoreHealth
sfc /scannow

This is safer than copying winprint.dll from another PC, which usually fails with “access denied” because the folder is protected, and can introduce a mismatched version. If SFC can’t complete, see Windows Resource Protection could not perform the requested operation.

You may also see other keys under Print Processors that belong to printer makers. Leave them alone unless you’re sure they’re from software you’ve removed; reinstalling the driver normally repairs them.

Fix 4: Remove and reinstall the printer driver

When the error appears while adding a printer, the installed driver package is usually the culprit. Removing just the printer isn’t enough; remove the driver package too.

1. Remove the printer: in Printers & scanners, select it and choose Remove.
2. In the same page, scroll down and select Print server properties (under Related settings).
3. On the Drivers tab, select Change Driver Settings if shown, select the printer’s driver and choose Remove, then Remove driver and driver package. If it says the driver is in use, restart the Print Spooler and try again.
4. Restart the PC.
5. Download the latest full driver for your Windows version from the printer maker’s support site and install it, then add the printer again.

On Windows Pro and Enterprise, printmanagement.msc shows every driver and lets you delete stubborn driver packages too.

If it’s a shared or network printer

• Fix the PC that shares the printer first: run Fix 1 to 3 there, because connected PCs rely on the host’s printer setup and driver.
• On the PC that connects, install the manufacturer’s driver locally first, then connect to the shared printer. Windows will use the local driver instead of downloading the host’s.
• If you also see 0x0000011b or 0x000003e3, follow Error 0x0000011b: Windows cannot connect to the printer or Printer error 0x000003e3 too.
• On a work network, printers deployed by Group Policy can bring the setting back; ask your IT team to update the driver on the print server.

Related guides

• Error 0x0000011b: how to fix “Windows cannot connect to the printer”
• Printer error 0x000003e3 “Operation could not be completed”: how to fix
• Windows Resource Protection could not perform the requested operation: 7 fixes

Official sources: for more detail, see Microsoft’s documentation and Q&A:

• Microsoft Support: Fix printer connection and printing problems in Windows
• Microsoft Q&A: Cannot connect to the printer, the print processor does not exist

Frequently asked questions

What is winprint?

It’s the standard print processor built into Windows (winprint.dll). It converts print jobs into the format the printer driver expects, and works with nearly every printer.

Will switching to winprint affect print quality?

Usually not. Some vendor print processors add features such as special booklet or watermark options. If you miss one, reinstall the manufacturer’s full driver package.

Why does the error say “print processor is unknown”?

That’s a closely related message (error 0x80070706), often seen when a printer is deployed by Group Policy. The causes and fixes are the same: the client is asked to use a print processor it doesn’t have.

Do I need to reinstall Windows?

Almost never. Restarting the spooler, switching to winprint, repairing system files and reinstalling the driver fix it in nearly all cases.