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There are a huge number of files in both patches, a lot of them common to both. You can view the file dates in KB4489885 and KB4474419 by looking at the associated Microsoft KB articles and scrolling to “file information”. My main concern is accidentally regressing files in the March Security Only Update – KB4489885. However, I don’t think the install sequence for KB4474419 – the SHA-2 Code Signing Support is quite as straight forward. I agree with the reasoning for installing KB4490628 -the Servicing Stack Update – first and rebooting.
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I’ve been following the discussions regarding KB4490628 and KB4474419 trying to determine the installation sequence. I’m an IT professional and a group B user.
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