I'm copying and pasting my own comment to be able to share it more.
SUCCESS!!!!!
I've been dealing with this issue for 1-3 months. Tried everything I found on the internet. Today I downloaded and reinstalled 3 .net framework applications and restarted my computer, thinking it would be just another of hundreds of attempts so far. Nope. Smooth as butter. All updates are now caught up.
These are them...
even if they're on your computer, run these installers. Repairing them doesn't work the same. DO NOT UNCHECK ANY .NET FRAMEWORKS in Programs and Features!!
.NET Framework 4.8 Runtime. The link is here...
https://dotnet.microsoft.com/en-us/download/dotnet-framework/net48
.NET 6.0 SDK (v6.0.302). The link is here...
https://dotnet.microsoft.com/en-us/download/dotnet/thank-you/sdk-6.0.302-windows-x64-installer
.NET 6.0 Runtime. The link is here... https://dotnet.microsoft.com/en-us/download/dotnet/6.0/runtime