https://community.usa.canon.com/t5/Printer-Software-Networking/imageCLASS-MF451dw-Windows-11-and-10-computers-recently-cannot/m-p/540907#M23370 <P>MF451dw that has worked for several years via wi-fi on my Windows 11 and 10 laptops now have errors and upon uninstalling the printers, Windows cannot find printers using the Windows nor Canon MF drivers setup wizard software ( MF450MFDriver V720W64).&nbsp; Printer connects to wi-fi router and attempts using a printer Auto IP address and static address also fail.&nbsp; The Canon setup software indicates removing firewall blocks, clicking Yes doesn't change failing outcome.&nbsp; I've run the Canon setup software as admin, but still no luck.&nbsp;&nbsp;</P> <P>Any recent Windows updates or firewall changes that are impacting Wi-Fi printing?&nbsp;</P> <P>&nbsp;&nbsp;<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="MF Firewall.png" style="width: 400px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/65312i1EA69288263D52DF/image-size/medium?v=v2&amp;px=400" role="button" title="MF Firewall.png" alt="MF Firewall.png" /></span></P> Sun, 23 Mar 2025 12:17:30 GMT bmcu 2025-03-23T12:17:30Z https://community.usa.canon.com/t5/Printer-Software-Networking/imageCLASS-MF451dw-Windows-11-and-10-computers-recently-cannot/m-p/540907#M23370 <P>MF451dw that has worked for several years via wi-fi on my Windows 11 and 10 laptops now have errors and upon uninstalling the printers, Windows cannot find printers using the Windows nor Canon MF drivers setup wizard software ( MF450MFDriver V720W64).&nbsp; Printer connects to wi-fi router and attempts using a printer Auto IP address and static address also fail.&nbsp; The Canon setup software indicates removing firewall blocks, clicking Yes doesn't change failing outcome.&nbsp; I've run the Canon setup software as admin, but still no luck.&nbsp;&nbsp;</P> <P>Any recent Windows updates or firewall changes that are impacting Wi-Fi printing?&nbsp;</P> <P>&nbsp;&nbsp;<span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="MF Firewall.png" style="width: 400px;"><img src="https://community.usa.canon.com/t5/image/serverpage/image-id/65312i1EA69288263D52DF/image-size/medium?v=v2&amp;px=400" role="button" title="MF Firewall.png" alt="MF Firewall.png" /></span></P> Sun, 23 Mar 2025 12:17:30 GMT https://community.usa.canon.com/t5/Printer-Software-Networking/imageCLASS-MF451dw-Windows-11-and-10-computers-recently-cannot/m-p/540907#M23370 bmcu 2025-03-23T12:17:30Z https://community.usa.canon.com/t5/Printer-Software-Networking/imageCLASS-MF451dw-Windows-11-and-10-computers-recently-cannot/m-p/540910#M23372 <P>On the Windows 11 laptop, I also turned off Domain network Firewall, Private network firewall, and Public network firewall and attempted to find printer but without any success.</P><P>MF Drivers and Canon Office Printer Utility are allowed to communicate through windows Defender firewall.</P> Sun, 23 Mar 2025 05:01:44 GMT https://community.usa.canon.com/t5/Printer-Software-Networking/imageCLASS-MF451dw-Windows-11-and-10-computers-recently-cannot/m-p/540910#M23372 bmcu 2025-03-23T05:01:44Z