Good day BillQRichards,
My name is Carlo, I'm an Independent Advisor and community member like you.
I am also using Windows 10 pc. Let us work together to sort this out.
Can you please take a screenshot of the square on the taskbar for me to have a better view which you are referring too.
For the meantime you can try to re- register the shell experience host using powershell.
-Click Start, type powershell and run as administrator.
-Copy and paste the command below and hit enter
Get-AppxPackage -AllUsers Microsoft.Windows.ShellExperienceHost | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Once done restart your device and check if issue persist.
Have a wonderful day ahead and stay safe. I'll look forward for your response.
With Warm Regards,
Carlo T.