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CharlieRR-1575 avatar image
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CharlieRR-1575 asked LimitlessTechnology-2700 answered

"Projecting to this PC" using "Connect" application only displays other Computer's screen when Defender is off

Hello,

I have 2 windows 11 Pro Laptops. When I which to cast one computer onto the other in order to use the second laptop as a secondary monitor, the screen is only displayed when Defender is disabled on the host (receiving) computer.

I have tried to emable all miracast or media related lines but for the life of me I cannot figure out which application to add. I am also unable to figure out where the executable for the "Connect" app is so I can add it to Defender.

Thanks,

Charlie

windows-11
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Did you observe similar behavior in the Windows 10?
Have you tried download and install all updates for Windows?

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SSengupta-4080 avatar image
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SSengupta-4080 answered CharlieRR-1575 commented

Make sure your graphic card driver is updated. If not visit the support site of the manufacturer to download and install the latest graphic driver.

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Just to add-on. My computers are fully upgraded on all ends (drivers, windows etc.) and casting DOES WORK when Defender is off. So what I am missing is the rule or executable run by "Connect" so I can enable it in Defender.

thanks

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LimitlessTechnology-2700 avatar image
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LimitlessTechnology-2700 answered

Hello

Thank you for your question and reaching out.
I can understand you are having some issues related to Screen projection in Windows 11.

According to my understanding, the Wireless Display uses WiFi Direct. On public networks, I don't want any inbound ports open. However, I was unable to mark my WiFi Direct wireless monitor as trusted, as I am able to do with standard WiFi wireless networks marked as private.

  • Program %systemroot%/system32/WUDFHost.exe

  • Protocol: TCP

  • Authorized Local Principals: NT Authority\User Mode Drivers

  • Local Port: Any

I didn't need to enable these inbound firewall rules for the public networks to get my previously connected wireless monitor to work, but they may be needed for discovery or other WiFi direct devices to work:
- Wi-Fi Direct Network Discovery (In)
- Wi-Fi Direct Scan Service Use (In)
- Wi-Fi Spooler Use (In)




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