Replace your Wi-Fi card with one that supports Miracast (Intel AX200, AC 8265, etc.). Not recommended for casual users.
You just need a cheap workaround.
The Invisible Cord: Solving the Miracast "Not Supported" Mystery It’s a frustrating modern-day tech riddle: you have a powerful PC and a sleek smart TV, but when you try to beam your screen wirelessly, Windows coldly informs you that your "device doesn't support Miracast." For a technology meant to eliminate cables, the barriers to entry can feel surprisingly rigid. The Anatomy of a Handshake Miracast isn't just a software toggle; it’s a high-stakes handshake between three specific components of your hardware. If any one of them drops the ball, the connection fails. The Wi-Fi Chipset
Before troubleshooting, verify if your hardware is capable of Miracast. It requires a display adapter with or higher and a Wi-Fi adapter that supports Wi-Fi Direct . Check via Command Prompt: Press Win + R , type cmd , and hit Enter. Type netsh wlan show drivers and press Enter.
The "Computer doesn't support Miracast" error can be frustrating, but by understanding the causes and following the troubleshooting steps outlined in this post, you may be able to resolve the issue. If you're still experiencing problems, it may be worth considering upgrading your computer or using an alternative streaming method. Happy streaming!