Windows 10 now boasts a 45.73% portion of the desktop OS market share, a significant increase from April's 44.10% figure.
Windows 7, meanwhile, continues to lose market share, decreasing nearly a whole percentage point from 36.43% to 35.44% over the last month.
macOS 10.14 has seen a slight increase in its market share, while Windows 8.1 lost 0.25% market share, falling to under 4%.
Windows 10 took over from Windows 7 as the most popular desktop operating system in December 2018, and has since grown a substantial lead over the older operating system.
Users with Windows 7 installed will need to upgrade to Windows 10 by 14 January 2020 to avoid losing support for their operating system.