ImageClass MF Series Scanner not recognized after Windows 10 patch

[pagjsp]

Around the second week in July we started having issues where our ImageClass MF247dw, MF267dw, and others would hang during a scan job to the connected computer, and eventually time out. I've followed all the recommended fixes I can find, and still several of the effected pc's have this problem on a daily basis, forcing me to uninstall and reinstall the printer/scanner again before they will function. Has anyone been tracking this, and has someone found a fix yet? Included are a couple of links explaining the problem.

https://www.bleepingcomputer.com/news/microsoft/microsoft-warns-windows-10-usb-printing-breaks-due-t...

https://www.techradar.com/news/windows-10-update-breaks-usb-printers-functionality-because-of-course...

https://askgarth.com/blog/canon-scanner-unable-to-open-twain-source/

[pagjsp]

Well, hate to "beat a dead horse" but this last Patch Tuesday, this happened again. We have (4) users with MF240 series printer/scanners and every one of them says "Connect the Computer" when using the scan button, and the MF Scan utility doesn't recognize the scanner either. What I have done is 1) Completely remove the Canon drivers from Control Panel/Programs and Features and 2) Reboot the computer and 3) Reinstall the Canon drivers. After a few minutes, the scanner works from the scan button on the device, as well as the MF Scan utility.

I did this on (1) of the effected machines last night, but had to do it again on this same machine, and the other (3) this morning. Surely Canon has received some other inquiries on this by now?

[billmrmi]

Same here, I have 6 people who can't scan so do I just throw these MF244dw in the garbage?

[Hector]

Hello Pagjsp,

If you are still having the issue after installing the latest drivers and software and it is only effecting certain computers, I would suggest contacting support over the phone at 1-800-652-2666. Our agents would be able to look further into the network environment or check what might be causing the scanner connection to time out.

[pagjsp]

Hector, last time this happened (last month, right after Microsoft Patch Tuesday) it effected several workstations, all with the same "connect the computer" message when trying to scan. I uninstalled the latest Microsoft patches, reinstalled the Canon MF drivers and scanner app, and they've all been fine since. I was relating this to a Xerox tech during a visit to service our Xerox leased printers, and as it turns out he used to work for Canon. He wasn't surprised, and said the problem stems from shared dll files that get corrupted or overwritten when Microsoft installs certain patches, and that Canon has known about this for some time. Why haven't they come up with a fix yet, you may wonder? I certainly do.

[SyntheticGoo]

I am experiencing the same issue and have been for months now. It seems to affect only the scanning ability on my  MF249dw. Device is connected via USB. The solution for me is to uninstall / reinstall Canon's driver, but after the next Windows patch update the problem returns. I am beyond frustrated and will be replacing my MF249dw for a non-Canon product soon.

Nice job, Canon!

[pagjsp]

For what it's worth, the MF270 series printers (and I suppose later model series) don't exhibit this behavior. I've installed several of those and they're fine. But, it's a pain (and somewhat expensive) to replace a bunch of perfectly good printer/scanners with a newer model just because Canon (who must know by now what's going on) won't issue new drivers or patches to fix the problem on their older models. I suppose from their viewpoint, they're thinking "Why should we?"