Microsoft decided to change the update delivery model for Windows 7 & 8.1 to the one used for Windows 10. The latter uses a more advanced update model, which is based on automatically downloading all updates for Windows as a cumulative update package. The difference between this model and the one used in older versions of Windows is that when you update your copy of the OS to the current state, the user does not need to download and install each update separately, they will be downloaded and installed automatically. This measure is particularly relevant for users of fresh copies of Windows 7 & 8.1, which are not updated at all. From October 2016, users of these OSs will be able to upgrade a clean copy of the OS to the current state with just one cumulative update.Source: https://habr.com/ru/post/308158/
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