Microsoft is switching Windows 7 and Windows 8.1 to a cumulative update model similar to the one used by Windows 10. The company is moving away from the individual hotfix approach it has used thus far for those operating systems.
One of the major differences between Windows 7 and 8.1 on the one hand and Windows 10 on the other is what happens when you run Windows Update. Microsoft’s two older operating systems usually need to fetch a handful of individual patches each month. If a system hasn’t been patched for a few months, this can require dozens of individual fixes to be retrieved. In the case of a clean installation, that number can reach the hundreds.
