Canon Printer blocked

[NikkiN]

Last week this printer worked fine, this week it quit being recognized by one computer among 3 connected to it.  I uninstalled and reinstalled the printer. Windows saw it and connected it, but then wouldn't print. Turning off Defender and Malwarebytes, got the printer functioning.  Turning Defender back on, it still worked, but quit again when Malwarebytes was re-enabled. How do I fix this, and what happened to cause this in a previously functioning machine?

[Porthos]

1 hour ago, NikkiN said:

How do I fix this

Let's try and get some logs first so the team can review them and see if they can tell what may be causing your issues....

1. FIRST: Create and obtain Farbar Recovery Scan Tool (FRST) logs
2. Download FRST and save it to your desktop. Tell any program that blocks it to ignore or allow. It IS SAFE. It contains no info that can identify or harm you.
3. NOTE: You need to run the version compatible with your system. You can check here if you're not sure if your computer is 32-bit or 64-bit
4. Double-click to run FRST and when the tool opens click "Yes" to the disclaimer
5. Press the "Scan" button
6. This will produce two files in the same location (directory) as FRST: FRST.txt and Addition.txt
   NOTE: These two files will be collected by the MB-Check Tool and added to the zip file for you
7. NEXT: Create and obtain an mb-check log
8. Download MB-Check and save to your desktop
9. Double-click to run MB-Check and within a few second the command window will open, then click "OK"
10. This will produce one log file on your desktop: mb-check-results.zip
11. Attach this file to your forum post by clicking on the "Drag files here to attach, or choose files..." or simply drag the file to the attachment area

[NikkiN]

The requested files are attached

mb-check-results.zip

[Porthos]

25 minutes ago, NikkiN said:

The requested files are attached

It seems like you have the beta installed. "controllers_version" : "1.0.273".

Please use MB Clean to reinstall the released version. 

Tool can be found at https://downloads.malwarebytes.com/file/mb_clean

1. After downloading the tool run the tool.

2. The tool will automatically clean up the older possibly damaged installation and will ask you for a restart.

3. Restart your system and then the MB-Clean tool will prompt you to re-install the latest product.

4. Click on "Yes" to reinstall MB 3.×.

5. Now you will have the latest product installed. If it does not offer the new install after the reboot you can download and install from here. 

https://downloads.malwarebytes.org/file/mb3

 Please let me know if you are still seeing issues after the  install.