Windows 10: Why I always see this error while trying to connect my phone to my PC?

I've tried reinstalling it more than 10 times but I still get this error. Please Help.

:)

 

PC Windows 10 Bluetooth won't connect with Pixel 3XL phone

I have a Lenovo Yoga C930 PC (Win 10) that I cannot connect to my Pixel 3XL phone. I can get them to pair, but the PC bluetooth will only hold the connection for about 1 second, then says 'not connected'.

I have removed the PC from the phone's list of previously connected devices & then re-paired-numerous times. I have shut down & re-started both devices numerous times. None of these actions have worked. I am praying that one of you smart readers can help me solve this highly frustrating problem, pretty please?

BTW, I recently ran the upgrade on my phone from android 9 to 10. Could this be the problem? I see other changes on my phone that I think add steps & make it more cumbersome to use. Wish I could dump android 10 & go back to 9, but don't know how to do that either. If that is not the cause of this connection problem with the PC, I can live with it.

I would appreciate all advice. Please know that I am a 60-something year old- more knowledgeable than a basic user, but not super well versed in all of the software & hardware fixes that many of you know, so please write your suggestions/solutions accordingly. Many thanks in advance

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

When my phone fails to upgrade I just keep trying. One upgrade took 3 or 4 tries.

 

Supported phones for Windows 10 Mobile Insider Preview Mobile

Your list confirms my phone is eligible, Lumia 521. The windows Insider App fails after ~ 15 seconds, restores data and gives me error 80073cf9. I trouble shot this and went thru all the steps mentioned on several websites including MS without any luck. Short of a hard reset, this is where I am now. Suggestions appreciated.