Windows 7's security rollups, the most comprehensive of the fixes it pushes out each Patch Tuesday, have almost doubled in size since Microsoft revamped the veteran operating system's update regimen last year.

According to Microsoft's own data, what it calls the "Security Quality Monthly Rollup" (rollup from here on) grew by more than 70% within the first dozen issued updates. From its October 2016 inception, the x86 version of the update increased from 72MB to 124.4MB, a 73% jump. Meanwhile, the always-larger 64-bit version went from an initial 119.4MB to 203.2MB 12 updates later, representing a 70% increase.

The swelling security updates were not, in themselves, a surprise. Last year, when Microsoft announced huge changes to how it serviced Windows 7, it admitted that rollups would put on pounds as the months pass. "The Rollups will start out small, but we expect that these will grow over time,' Nathan Mercer, a Microsoft product marketing manager, said at the time. Mercer's explanation: "A Monthly Rollup in October will include all updates for October, while November will include October and November updates, and so on."

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