Fix Print Spooler Error for Canon Printers (Windows)
Verified fix guide · Updated July 2026 · By the PrinterCareUSA remote support team
Canon printer spooler errors are frustrating because Windows keeps the Print Spooler service running in the background, but corrupted print jobs or driver conflicts cause it to stop responding. Your printer appears offline and new jobs stack up indefinitely, making it look like a hardware failure when it's actually a software jam.
This guide walks you through technician-level fixes that address the root cause: clearing corrupted spool files, restarting the service properly, and removing stuck jobs from the queue. Most users solve this without calling support.
How to fix it — step by step
- Clear the Print Queue from Settings (Easiest First). Open Settings > Devices > Printers & Scanners, find your Canon printer, click it, then select 'Open queue.' Click the printer name at the top to open the menu, select 'Printer' > 'Cancel All Documents.' This removes stuck jobs from Windows' view without touching system files.
- Stop the Print Spooler Service Manually. Press Windows key + R, type 'services.msc' and press Enter. Scroll to 'Print Spooler,' right-click it, and select 'Stop.' Wait 5 seconds—this halts the service completely so you can clear corrupted files underneath.
- Delete Spooler Files from the System Folder. Open File Explorer and navigate to C:\Windows\System32\spool\PRINTERS. Select all files inside (Ctrl+A) and delete them. These are the corrupted job files causing the crash. If a file won't delete, skip it—Windows locked it for a reason.
- Restart the Print Spooler Service. Go back to services.msc, right-click 'Print Spooler,' and select 'Start.' The service will rebuild a clean queue folder. You should see the status change to 'Running' within 3 seconds.
- Remove and Re-Add Your Canon Printer. In Settings > Devices > Printers & Scanners, click your Canon printer and select 'Remove device.' Restart your computer, then add the printer again by clicking 'Add a printer or scanner.' Windows will reinstall the driver connection cleanly.
- Update or Reinstall Canon Print Driver. Visit Canon's support site, search your printer model, and download the latest printer driver for Windows 11 or Windows 10 (whichever you use). Run the installer and choose 'Repair' if prompted. Outdated drivers cause the spooler to crash when processing certain job types.
- Check Event Viewer for Spooler Errors (Diagnostic Step). Press Windows key + R, type 'eventvwr.msc,' and go to Windows Logs > System. Look for errors from 'Print Spooler' with codes like 3003 or 9 (common Canon issues). Note the exact error code—this identifies whether it's a driver conflict, USB connection issue, or network problem.
- Disable and Re-Enable Print Spooler Startup Type. In services.msc, right-click 'Print Spooler' and select 'Properties.' Change 'Startup type' from 'Automatic' to 'Disabled,' click 'Apply,' restart your PC, then change it back to 'Automatic' and restart again. This hard resets the service initialization.
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Frequently asked questions
Why does my Canon printer spooler keep stopping after I fix it?
A corrupted printer driver or USB connection issue causes the spooler to crash repeatedly. Update your Canon driver to the latest version, or if using USB, try a different cable or port. If the problem returns within days, the printer's firmware may need updating via Canon's utility software.
Can I fix this on a Mac, or is this Windows-only?
This guide is for Windows. On macOS, open System Preferences > Printers & Scanners, right-click your Canon printer, and select 'Delete.' Then System Preferences > Printers & Scanners > '+' > locate and re-add the printer. Mac doesn't use the same spooler architecture as Windows.
What if I delete the spooler files and nothing changes?
The issue may be a hardware problem—Canon printers sometimes have failing USB controllers or network cards that cause the driver to crash. Run a network printer diagnostics test from your Canon printer's menu (if it's networked) or test with a different cable if USB. If diagnostics show errors, the printer may need professional repair.
Is it safe to delete files in C:\Windows\System32\spool\PRINTERS?
Yes—this folder contains only temporary job data, not system files. Windows automatically recreates the folder when the Print Spooler restarts. Never delete anything in the parent System32 folder itself, only the PRINTERS subfolder inside spool.