Notebook Software and How To Questions

Hello!  I'm really new here but I'm hoping I can get some help here.  I have an HP Pavilion 17 Notebook PC and I've had it since 2014.  Within the past 3 months, I've started to get these notifications on my computer that say "This application requires one of the versions of the .NET Framework : v4.0.30319.  Do you want to install this .NET Framework version now?"  And every time I agree to download the newest version, it will start downloading and give me the following error.  "Your installation will not occur.  See below for reasons why." and below it says  ".NET Framework 4.8 or a later update is already installed on this computer."  The programs it's referring to for the .NET framework update are for Avira (my anti-virus) and HPWarrantyChecker.exe.  And because it's not letting me download any new versions, I keep on getting these pop-ups on my computer requesting the update every five minutes and I just have to keep on closing them because there's nothing it will let me do except keep on cancelling the download.  Can anyone please help me with this?  It's getting really annoying having to close out these update requests every five minutes.  Thank you!