Canon Scanner Not Working — Fix Scan to Computer
By Ryan Green · Updated August 2026 · Independent guide · PrinterCare USA LLC (not affiliated with any printer manufacturer)
Canon all-in-one printers handle printing and scanning through separate driver components, which means your print functionality can work perfectly while scanning fails completely. This frustrating situation typically stems from driver conflicts, USB communication problems, or scan software crashes rather than hardware failure.
The good news is that most Canon scanning failures are fixable at home in under thirty minutes using the steps below. We'll walk you through reconnecting your scanner to the computer, clearing out corrupted software, and testing each connection point so you can get back to scanning documents without expensive service calls.
How to fix it — step by step
- Check USB Connection and Power Cycle. Unplug the USB cable from both your Canon printer and your computer, then wait ten seconds. Plug the USB cable back into a different USB port on your computer and reconnect it to the printer's USB port on the back panel. Power off the printer completely using the power button, wait fifteen seconds, then power it back on and allow it two minutes to fully initialize before attempting to scan.
- Verify Scanner Recognition in Windows or macOS. On Windows 11, open Settings, go to Devices, then Printers and Scanners, and look for your Canon model listed there. If you see it, click it and select Remove Device, then restart your computer so Windows can rediscover it. On macOS, open System Settings, navigate to General then Printers and Scanners, locate your Canon, and click the minus button to remove it, then add it again by clicking the plus button and selecting your printer from the list.
- Uninstall and Reinstall Canon Printer Drivers. Go to the Canon support website, search for your exact printer model number, and download the latest full driver package for your operating system. On Windows 11, open Control Panel, select Programs and Features, find all Canon-related entries, and uninstall each one completely. Restart your computer, then run the Canon driver installer you downloaded and follow the on-screen prompts to install fresh drivers, then restart again.
- Install or Update Canon IJ Scan Utility. The Canon IJ Scan Utility is the standalone software that enables scanning from your computer rather than just using the printer's built-in scan buttons. Visit Canon's support page for your model, download the IJ Scan Utility software, and install it on your Windows 11 or macOS system. After installation completes, restart your computer and launch the IJ Scan Utility from your Applications folder or Windows Start menu to test scanning.
- Test Scanning with the Printer's Physical Scan Button. Place a document in your Canon printer's document feeder or on the glass bed, then press the green Scan button on the printer itself rather than using your computer software. Check your computer to see if a scan window appears or if a file is saved to your Documents folder automatically. If scanning works from the physical button but not from your computer software, your hardware is fine and the issue is purely software-related, which narrows down your next steps significantly.
- Check Firewall and Antivirus Blocking Scanner Communication. Your Windows 11 firewall or third-party antivirus software might be blocking the scanner software from communicating with your printer over USB. Open Windows Defender Firewall on Windows 11 by searching for it in the Start menu, click Allow an App Through Firewall, and look for your Canon application in the list. If it is not present or is blocked, click Change Settings, then Find Another App, navigate to your Program Files folder, and select the Canon scanner executable file to whitelist it.
- Clear Stuck Print and Scan Jobs from the Queue. Stuck jobs in your printer queue can prevent new scan commands from processing. On Windows 11, open the Control Panel, go to Devices and Printers, right-click your Canon printer, select See What is Printing, and delete any jobs that appear stuck. On macOS, open System Settings, go to Printers and Scanners, select your Canon, and click Open Print Queue to remove any pending items, then restart your Mac.
- Factory Reset Your Canon Printer as Last Resort. If none of the above steps work, perform a factory reset on your Canon printer by holding down the power button for thirty seconds while it is powered on, then release and restart it normally. This erases all settings and clears any internal error states that might be preventing scanner detection, though you will need to set up your Wi-Fi or USB connection fresh afterward. After the reset completes and your computer rediscovers your printer, attempt scanning again using the IJ Scan Utility.
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Frequently asked questions
Why does my Canon printer print but not scan?
Printing and scanning use separate driver components and software in Canon all-in-one models, so one can fail while the other works fine. Scanner failures are usually caused by outdated drivers, USB communication dropouts, or scan utility software crashes rather than a broken scanner. Reinstalling drivers and checking your USB connection fixes the problem in most cases within thirty minutes.
Should I try Wi-Fi scanning instead of USB if USB scanning does not work?
Yes, if your Canon printer supports network scanning and your computer is on the same Wi-Fi network, try adding the printer as a networked device rather than a USB device and attempt scanning that way. This approach completely bypasses USB cable and port issues and can help you determine whether the problem is USB-specific or a broader scanner failure. However, most users need their USB scanning working, so use this as a diagnostic test rather than a permanent solution.
What is the difference between my Canon printer and the IJ Scan Utility?
Your Canon printer is the physical hardware device that sits on your desk and contains the scanner mechanism. The IJ Scan Utility is the computer software that communicates with your scanner and allows you to initiate scans from Windows or macOS rather than pressing the physical button on the printer itself. Both must work together for computer-based scanning, so if the utility is missing or outdated, scanning from your computer will fail even though the hardware is fine.
Is it worth paying $49 for remote support if my basic troubleshooting fails?
Yes, if you have completed the reinstall and USB steps above without success, a remote technician can see your exact error messages and printer settings in real time and usually identify the problem within ten minutes. This typically costs far less than replacing your printer or paying for in-person service, and most issues are resolved by enabling hidden settings or clearing specific error codes that are difficult to find on your own. Remote support saves you time and frustration compared to endless troubleshooting when you need your scanner working today.