Can't mirror/cast PC to Roku TV and can't find my old solution

No thanks to the stock response on this site, I did find the information I was looking for. One of these two options did the trick for me:

https://answers.microsoft.com/en-us/windows/forum/all/possible-fix-for-microsoft-wireless-display/b48237dc-6ab4-439f-ba55-8b0b92da5ef1

(In my case, I switched from .137 to .173)

AND/OR

https://answers.microsoft.com/en-us/windows/forum/all/my-pc-thinks-its-running-windows-to-go-because-i/21f89887-5989-42e9-befc-4ed24399232c

Kindly refrain from scrubbing this post from your site since it is the ONLY solution that has ever worked for me. I believe it will benefit many other people as well.