After updating, run the dxdiag check again. “Not available” should now say “Available.”
If you have a relatively modern laptop or desktop running Windows 10, you likely already have the "software" part installed. download miracast for windows 10
Let me know in the comments below!
Microsoft provides the official way to add or remove Miracast support via in Windows Settings. That’s the closest thing to a “download.” After updating, run the dxdiag check again