.NET MU docs

[joeloff]

Summary

Add documentation that describe configuring Microsoft Update for .NET. This pulls together some content from various blog posts and includes additional options introduced during .NET 9 to better support .NET updates for FDD applications.

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Internal previews

📄 File	🔗 Preview link
docs/core/install/windows.md	Install .NET on Windows

[joeloff]

[update] Think I figured this out

What is the relative link to use for absolute URLs outside of .NET docs?

'https://learn.microsoft.com/windows/win32/setupapi/run-and-runonce-registry-keys' will be broken in isolated environments. Replace with a relative link.

[jamshedd]

@joeloff the content is fine, but I have a concern with the placement of the text within the MU section. I'm assuming the new ability to defer reboots is not limited to FDD installs deployed via MU, it can be used even if a customer is deploying the installer themselves in some other way? If so can we place this outside of the MU specific section?

[joeloff]

@joeloff the content is fine, but I have a concern with the placement of the text within the MU section. I'm assuming the new ability to defer reboots is not limited to FDD installs deployed via MU, it can be used even if a customer is deploying the installer themselves in some other way? If so can we place this outside of the MU specific section?

I see your point. The feature was introduced to specifically deal with the MU situation, but you'd see it if the update is quietly installed and run under SYSTEM, e.g. if you manually pushed it out using SCCM.

I can move it to the troubleshoot section in the main windows.md doc, would that work better?

[joeloff]

@jamshedd I updated the docs based on what we discussed

I kept MU in a separate MD file, but it's included under the Install .NET section in the Windows.md file. I moved the deferral section out as a separate, more general "choose when to remove" and included a note about availability and impact because things like WinGet uses the standalone installers too

[gewarren]

Thanks for adding this. Tagging @adegeo too.