Windows 7 and cumulative update patches starting from this month, Microsoft explains more
However, with Windows 8 and windows 7, the security updates of IE wouldn’t be shipped together though. Now, as the Patch Tuesday is today, Microsoft has explained more about the cumulative update model. Windows 7 and Windows 8.1 computers will get a security-only quality update every month, and this will be published as “Security Update” with a unique KB number.
Additionally, there’ll be a security monthly quality rollup which is more of a monthly rollup containing all security fixes needed to bring a computer fully up to date.
The update would simultaneously be available to Microsoft update catalog as well for offline Installation. You can get more details here:
Fixes to be released on third Tuesday of each month
“An additional monthly rollup containing a preview of new non-security fixes that will be included in the next monthly rollup, as well as fixes from all previous monthly rollup. This can also be called the ‘preview rollup,’”
Thanks to Softpedia as well.