Hi   @Solla-topee ,

Thank you for your help. I ended up submitting a support request, and am getting help from a senior support engineer. So I'm going to let this thread go silent for a while. However, once the issue gets resolved, I'll post the solution here so that other people with the same problem can see it.

Rob

  @RobFreundlich 

Just in case anybody stumbles upon this thread with a similar issue. I was able to resolve this issue using the TP-Link Archer T2U Nano AC600. My current computer specs are:

Processor: Intel I-5 7600K

Motherboard: MSI Z270 Gaming Pro Carbon

GPU: MSI Gaming GeForce GTX 1060 6GB

Memory: 16 GB RAM Corsair(dont remember exact model)

Operating System: Windows 10 PRO x64(most current update)

My PC is hardwired and does not natively have wifi so I had the same issue as OP. Once I plugged in the adapter and downloaded the drivers, I was able to easily project to and from this PC. I DID NOT have to connect to wifi to use the miracast feature. I was able to stay hardwired the entire time I was using miracast features. This leads me to conclude that the T2U Nano does support miracast. Hope that helps.

  @MandoMK3 Thanks for the tip! For $15 on Amazon (with 1-day delivery!), it's kind of a no-brainer for me to give this a try. I'll report back after I get it and try it out.

@MandoMK3 It came in yesterday, and I just installed it. NO love. I think the code problem is that there's something deep down in the chipset of the computer's motherboard that doesn't support Miracast.  So no matter what WiFi dongle I put on top of it, it just won't work.

Bummer.

Well, the computer is 6 years old. That's like 47 in dog years, and who know how many in computer years. It does well otherwise, though, so I don't know whether it's practical to replace it for this one feature that I won't use very often but woul be so freaking cool!!!!!