Windows 10 last month for the first time passed the 40% milestone, but adoption still lagged behind the venerable Windows 7, which refused to budge from its dominant spot.

According to California-based analytics vendor Net Applications, Windows 10 added a full percentage point in June, accounting for 35.7% of the user share of all personal computers and 40.4% of all those running Windows last month. (The second number is larger than the first because Windows powered 87.9% of all PCs, not 100%.)

The 40.4% represented an estimated 606 million Windows personal computers, calculated using Microsoft’s oft-cited number of 1.5 billion Windows PCs worldwide. Microsoft’s most recent claim for Windows 10 was that the operating system was on nearly “700 million … connected devices,” a statistic it touted in early May. However, Microsoft counts not just PCs, but also Xbox gaming consoles, tablets and a small number of Windows-powered smartphones, which run Windows 10.

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