Outlook send/receive problem

I am running Office 2016 on my desktop Windows PC. Windows recently upgraded itself to version 2004. Since then I have been having intermittent problems with Outlook. When I boot-up, open Outlook, and do a send/receive, it always works perfectly. After being open for some time, it will start to give me 0x8004210A errors for every email account that I have. I think I can still send but the problem seems to be on the receive function, I think. Re-booting the PC fixes the problem. It will also sporadically pop up the window to enter my password, but like I said, it always works when I start up. Ideas?

Try this:

1. Right click on Windows button and select "Windows PowerShell (Admin)"
2. If prompted for password, enter administrator password and click "Yes" to continue
3. Run command:

Code:

Clear-DnsClientCache

Settings -> System -> About -> Advanced System Settings -> computer name -> Network ID -> This is home computer...

Click OK and restart computer.

My initial post was incorrect. My Outlook problems started on my desktop computer when it updated itself to Windows version 20H2. I did finally resolve the problem by flushing the DNS.