“Do you have Windows 10?”
Not only, “No”, but “Hell, no!”
https://www.laptopmag.com/articles/mirror-screen-windows-10
“Think I am the only one now days still with 7.”
You’re not the only one. (Out of my cold, dead hands.) ;)
But my hubby has Win 10 so I’ll check it out on his laptop. Thank you!
LOL!! Knew there was some reason I ‘liked’ you! :^)
A couple of links for work arounds for Windows 7.
A poster mentions Teamviewer, at the fifth post, not acquainted with it.
https://www.cnet.com/forums/discussions/how-to-do-screen-mirroring-with-smart-tv-with-windows-7/
And through a router if you have one, wired or wireless.
https://mywindowshub.com/stream-videos-from-windows-7-pc-to-tv/
And finally a search with DuckDuckGo for casting.
https://duckduckgo.com/cast streaming from pc windows 7 to TV
Hope this ‘heps’.
Take care........pilgrim