imageFORMULA R40 Continually giving message "Cannot find scanner. Check the power and the cables."

[hfrost]

My scanner is giving me this message each time I try to scan. "Cannot find scanner. Check the power and the cables." I have tried plugging it into new outlets, using a different USB connecting cord, and I have removed the CaptureOnTouch V4 software and re downloaded that. Please help! I have windows 11 on my hp desktop

[bear211]

Try this. Not sure if the R40 and SR40 are the same. But I tried and got the RS40 to work.

Run RepairReg.exe. Under: C:\Program Files (x86)\Canon Electronics\CaptureOnTouch\Tools. Once it runs and fixes any issues, unplug the scanner from your computer and reboot your computer. Once your computer is up and running, replug it back in, and turn it on.

[ordad12]

Here are the complete directions based on the help above (thanks everyone!) that I used to get my R40 working after installing the Windows 11 24H2 update on my computer:

1) Exit CaptureOnTouch 
2) Go to hidden ProgramData folder by pressing the Windows key + R at the same time to open the Run menu. Type %programdata% and press Enter

3) Go to C:\ProgramData\Microsoft\Windows\Start Menu\Programs\CaptureOnTouch\Tool

4) Click on the shortcut for System Configuration
5) Under Thin Client Mode, change from Disabled to Citrix: Twain Redirection, then click OK.
6) Open up CaptureOnTouch. If the scanner is not recognized, use the Restoration Tool for Scanner Registry described in “Scanner not recognized” information in the Troubleshooting section on Canon support website.

7) Once the tool is downloaded, double-click on the RepairReg.exe file to run the utility. The utility will determine if there are any inconsistencies and try to fix the issue.

7) Restart the computer to complete restoration of the registry.

😎 Open CaptureOnTouch and test operation

[LeeDock]

This finally did it for me.  I spent hours trying to fix this.  What killed me was I was able to scan from the "devices and Printers" section in the control panel.  "Control Panel\Hardware and Sound\Devices and Printers" but couldn't get CaptureOnTouch to see the RS40.  What a pain in the butt.  Glad I found this community.  I just signed up in case I need help again.