To tell you the truth, I don’t really know. All I know is that is what kick started Microsoft Update to work in Windows 7 after letting it sit for several hours at “looking for updates” after the initial installation.

I’m looking into this since I need a win7/10 VM for testing and I found out that since Oct for Win7 there will be one cummulative update per month that addresses security/reliability issues and previous patches (before Oct) will be added as time goes on so in the end, there will be just one big all-in-one patch to apply if a clean reinstall is needed.   My System SpecsSystem Spec

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Computer Type PC/DesktopOS Win10