Networked PIXMA TS6120 & MX922 always show offline after computer reboot

[Stoshu4]

I have 2 canon printers on my wireless network (TS6100 & MX920). A few months ago I started having issues that every time I reboot my computer, the printers show as offline on all of our wired and wireless devices. If I try to print a doc, the printers appear as choices in the print window but show as offline. The printers do not show up at all in control panel or device manager.

2 Windows 10 computers wired connections

2 Win 10 laptops wireless connected

3 IOS phones wireless connected

I've tried all troubleshooting that I've found online

-Rebooted both computer and printers

-Verified that printers are connected to the same network - The screens on the printers show that they are online and connected to the correct network.

-Ran windows printer troubleshooter

-Tried updating printer drivers but since the computers don't appear as devices on the network, the driver installation fails.

-Tried manually connecting the printers to the network through the printers and re-entered network password.

-Checked firewall settings in Bitdefender

-Tried reinstalling the printers as new devices

I'm probably forgetting some troubleshooting efforts since I've tried them all several times. Sometimes, after several hours, they suddenly appear as available on the network. But then the next time I reboot my computer (for unrelated reasons) they become unavailable again and I'm back to ground zero. I will appreciate any help I can get but I'm also in need of finding a solution that I won't have to repeat every time I reboot. Thanks in advance for your help

[shadowsports]

Re-read the thread.  I see you are using BitDefender, you believe you have an exception in place that does not exclude communication with the printer.  Is BitDefender installed on the other computer that is working now?  Use the "Power User" feature in BD to temporarily disable real-time protection and retest.  

There are only a couple of possibilities left to be ruled out.  

[dpbrick]

I have run into your original problem many times with printing to my Canon printers using Windows 10 and 11. Everytime for me it has been an issue with the Windows Print Spooler. I suspect there is some glitch between the print spooler and Canon printing software. At any rate, IF this is the issue, the only way to solve it is to purge the print spooler. This is very simple to do, but not something one would intuitively perform to fix this problem, since the troubleshooters always fail to fix the issue. 

To purge the Print Spooler, perform the steps given in this link: https://windowsloop.com/clear-print-spooler-windows-11/ 

[bhadorshidi]

 I suspect there is some glitch between the print spooler and Canon printing software. At any rate, IF this is the issue, the only way to solve it is to purge the print spooler https://techaoo.com/
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https://tonysexpress.com/