Before troubleshooting software, confirm your PC actually supports the standard: Command Prompt Method , and enter netsh wlan show drivers . Look for "Wireless Display Supported" ; it should say for both the Graphics and Wi-Fi drivers. DirectX Diagnostic (DxDiag) , then click Save All Information
That error message isn't telling you your computer is broken; it's telling you that the "language" of Miracast isn't being spoken correctly. Usually, updating the "brain" (Graphics Driver) or resetting the "legs" (Network) gets the story back on track so you can watch your your device doesn t support miracast windows 11
Miracast requires an active wireless adapter. If it is disabled or outdated, the feature will fail. Device Manager Network adapters , right-click your wireless card, and select Enable device : Right-click the same adapter and select Update driver Search automatically for drivers Usually, updating the "brain" (Graphics Driver) or resetting