Windows 11 Miracast Not Working [better] [Firefox]

Add an optional feature to reinstall it fresh. Real-World Fixes & Community Advice User experiences often point to simple environmental factors that system diagnostics might miss. Practical Fixes from the Community Sometimes the solution is physical or related to a specific Windows update that broke previous settings. “My problem was I didn't use the antennas. Once I did, I rebooted Windows and system reset Roku and I'm good to go.” Microsoft Learn

If drivers are updated but the connection fails, your network stack might be corrupted.

Confirmed "Wireless Display" is installed in Settings > Apps > Optional features . windows 11 miracast not working

Third-party firewall or antivirus software often blocks the ports required for Miracast (specifically UPnP and SSDP protocols).

Also update (Intel/AMD/NVIDIA) from the manufacturer’s website. Add an optional feature to reinstall it fresh

Here’s a step-by-step troubleshooting guide to fix .

Press Windows key + K . If you see a message saying, "Your device doesn't support Miracast," it likely lacks compatible hardware. Technical Requirements: Graphics: Must support WDDM 1.3 or higher. Wi-Fi: Must support NDIS 6.30 and Wi-Fi Direct . “My problem was I didn't use the antennas

| Condition | Status | |-----------|--------| | Miracast supported ( dxdiag ) | ✅ | | Wi-Fi on (not just Ethernet) | ✅ | | Wireless Display feature installed | ✅ | | TV in screen mirroring mode | ✅ | | Same Wi-Fi band (2.4/5 GHz) | ✅ | | No VPN/active firewall | ✅ |

Miracast requires Wi-Fi (even if casting to a TV without internet).