If your PC is older and the dxdiag report confirms it doesn't support Miracast, you aren't out of luck. You can use hardware workarounds:
When all else fails, a high-quality HDMI cable never gives a "driver not supported" error. this device doesn t support miracast
Nothing humbles you quite like trying to wirelessly cast a movie to the TV and getting hit with that dreaded "This device doesn't support Miracast" error. 🚫📺 If your PC is older and the dxdiag
Miracast can struggle if your laptop is on a 5GHz band while your TV is on 2.4GHz. Try forcing your network adapter to one specific band: Go to > Network adapters . Right-click your Wi-Fi card > Properties > Advanced . this device doesn t support miracast