Your very clear steps fixed it 1st time. Many thanks for the solution it is rare that such precise advise is found on the web Hello Jeff, thank you very much for posting this solution, it worked out fine for me. The “path” details you mention arleady have some Intel thing in it so I added what you said seperated by a semicolon but still get the error message. I am trying for help again, the scanner works fine the first time in the day that I am using it. New 07 Apr 1. After the PC resumes, the scanner may not function correctly.

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Is your USB3 Intel?

CanoScan F – Support – Download drivers, software and manuals – Canon UK

Scanner driver canoscan 4400f twain be closed. Cannoscan 7 64 bit and a Canon F. Took me a hour to get the Scanner running 4400 x Product range Canon CanoScan F. Enter your requirements and find the lens for you. View All Camera Bags.

Network Cameras Network Cameras. View All Business Services. It Works, thanks you so much! It worked like a charm. Search Our Knowledge Base Please enter your question: Canoscan 4400f twain this button will bring up the Environment Variables dialog. Thank you so much for this info.


On this tab, you will find the applicable drivers for your product danoscan in canoscan 4400f twain absence of any drivers, an explanation of your product’s compatibility with each operating system.

Register a Canon product or view service info. Went to Control Panel and uninstalled the scanner. Our Canon scanner has periodically had issues requiring us to reinstall the software.

Everything now working again Wow! Path fix did NOT work as others canoscan 4400f twain twxin for this version. I’ve been very frustrated with my scanner. No need now to buy a new one.

How to install the Twain driver for a Canon scanner?

Cheers and keep up the good work. Thanx for the tip! When I try to use it again a couple of hours laterit keeps saying the server is busy and to switch canoscan 4400f twain, when I do that it still says that the scanner is busy. This limited warranty covers all defects encountered in normal use canoscan 4400f twain the Product and does not apply in the following cases: Now I can use my scanner canoscan f.


Guess what – I couldn’t get canoscan 4400f twain toolbox working, until I thought to swap leads with the F. Thought I’d have to buy a new scanner.

Canon Scanner – Unable to open TWAIN source

This solution worked for me, thank you Help please! Canon scanners can be quite picky about usb3 for instance.

Seems like I have a problem with every scanner I connect and I luckily keep finding this solution to my canoscan 4400f twain. Thank you kind sir! My F stopped working after upgrading to Win 7 SP1. Today I had another bash at it, was just about to throw in the towel again, and then found your page.

I had tried some other combinations of known bit drivers for other models and different toolboxes, but ended removing it all and deleting the twain drivers in despair.