topic Re: RS40 Scanner driver installation error on Windows 11 in Scanners

RS40 Scanner driver installation error on Windows 11

ihky14 — Tue, 08 Sep 2026 17:07:30 GMT

Hello, I am attempting to install a brand new Canon RS40 Scanner on my Windows 11 laptop and I am receiving an error when installing the drivers and the scanner is showing as "No driver installed" when plugged into the laptop. The error is this:

Please assist. I do not want to return this scanner.

Thank you.

Re: RS40 Scanner driver installation error on Windows 11

shadowsports — Tue, 08 Sep 2026 19:09:43 GMT

Greetings,

While we look into this for you, can you please tell us if your computer is based on Intel/AMD architecture or Snapdragon Windows ARM?

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Tue, 08 Sep 2026 19:21:02 GMT

It is an Intel Core i7 Dell laptop. Thanks.

Re: RS40 Scanner driver installation error on Windows 11

shadowsports — Tue, 08 Sep 2026 20:36:05 GMT

Greetings,

Thank you.

Did this system have a scanner installed previously?

Did you connect the scanner to the system before or after attempting to install the scanner driver?

When prompted, its important that you are connecting directly to an available USB port on the motherboard and not to an accessory port on a peripheral or through a hub.

Drivers for the RS40 are available here:

Canon Support for imageFORMULA RS40 Photo and Document Scanner | Canon U.S.A., Inc. https://share.google/xKEMObVhcAvknLpHd

I have next steps, but I need for you to answer the above questions.

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Wed, 09 Sep 2026 12:44:45 GMT

Hi, the scanner was connected after attempting to install the driver - which never installed because once I clicked the "Ok" button at the bottom of that error, it appeared that the installation completed successfully. It was connected directly to the laptop onboard USB port. I have tried uninstalling, reinstalling and "repairing" the driver, but that message appears each time I attempt to do any of these. Of course, the scanner has been unplugged now and will remain unplugged until I am able to install the drivers with no error.

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Wed, 09 Sep 2026 12:48:27 GMT

Also, I noticed that when it prompted me to plug the scanner into the laptop (which I did), it didn't recognize it and "automatically continue).

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Wed, 09 Sep 2026 14:14:15 GMT

The laptop did not have a scanner installed previously.

Re: RS40 Scanner driver installation error on Windows 11

shadowsports — Wed, 09 Sep 2026 15:44:13 GMT

Good morning,

Thank you for all that information.

Your error is generic. It just says that one or more of the command line switches that the program uses to install was invalid or didn't work.

The software used to come with some tools for troubleshooting and repair. I'm going to download them to check and see if they're still available.

It's good that you didn't connect the the scanner until prompted to do so, and that you're connecting directly to the motherboard.

Are you using any third party antivirus software, something besides window security that comes with Windows? The software must also be installed under a user with administrator user permissions / privileges.

I'll need a few moments to download and inspect the software packages.

If you are in a hurry, support is also available directly from Canon. Their number is 1-800-652-2666. I am not a Canon employee, just a fellow user like you 🙂.

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Wed, 09 Sep 2026 15:54:32 GMT

Thanks Rick. Do Canon employees parse these community pages? If you find anything in the installers to help troubleshoot an install problem, please let me know.

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Fri, 11 Sep 2026 18:03:35 GMT

I was able to follow some instructions Canon support gave me to extract the driver INF files from the installer TEMP folder and save them elsewhere so I can use the device manager to point Windows to the driver, but now I am getting a driver signature error... Progress, but not solved yet.

Re: RS40 Scanner driver installation error on Windows 11

ihky14 — Mon, 14 Sep 2026 12:45:30 GMT

For the record on this, I followed up the above post with a call to Canon and they essentially said on the phone that I was out of luck and they could not help me. I, however, persisted and found a way to allow (temporarily) the installation of the driver I pulled from the earlier instruction by disabling driver signing verification in Windows 11. Once I did that, I was able to install the driver and Windows now recognizes the scanner and it works. This whole thing was a nightmare and it took 4-5 hours of troubleshooting/researching. Canon was ~50% helpful over the phone, but their overly complex drivers and lack of installation support is subpar. One thing I will mention is that it is easy to get through to someone on Canon's phone number and they do actually have US based support, but they gave up helping on more complex Windows support issues such as mine and essentially told me to return the scanner.

Re: RS40 Scanner driver installation error on Windows 11

shadowsports — Mon, 14 Sep 2026 14:17:41 GMT

Greetings,

I appreciate you reposting. I was traveling and thinking about your issue. Your persistence is excellent. This type of issue would typically only be known to the developer. I'm sorry to hear that support wasn't able to provide you with this solution. The repair application I mentioned is included with capture on touch, However, it doesn't have to do with driver signing. Hats off to you for discovering this 👏. I will absolutely put this in my back pocket for the future.

Congratulations again on the discovery. !!