After a September stumble, Windows 10 last month resumed its march toward replacing Windows 7 as the world's most popular operating system, an analytics vendor reported this week.

According to California-based Net Applications, Windows 10 added eight-tenths of a percentage point to its user share in October, reaching 38.3% of all PCs and 43.9% of those running Windows. (The second number is always larger than the first because Windows never powers all personal computers; in October, Windows ran 87.3% of the world's systems. The remainder ran macOS, Linux or Chrome OS.)

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As expected, Windows 10's October increase more than made up for the prior month's downturn. It was slightly larger than the 12-month average for the three-year-old OS and likely puts Windows 10 back on track for a sustained climb.

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