Starting December 2020, Microsoft will start delivering the .NET Core updates on Windows via Microsoft Update (MU). This will benefit the .NET Core applications that are using the Framework Dependent Deployment model. The apps that use the Self-Contained Deployment model, won't have any effect.
If you don't want to use the Microsoft Update service to update the .NET Core runtimes in your system, you can easily turn that OFF. Continue reading further to know more about this process.