Windows 10 was used by 22.99% of all PCs worldwide in August 2016, according to the latest data from Net Applications. That's yet another big month-to-month increase compared to 21.13% in July, June's 19.14% and May's 18.43% share for the OS.

Windows 10

This large market share rise for Windows 10 comes even as Microsoft's free upgrade offer for Windows 7 and 8.1 PC owners officially ended in late July, although the free offer is still available for PC owners who use assistive technologies.

The new PC OS market share numbers showed Windows 7 staying in first place with 47.25% in August, which is actually up slightly from 47.01% in July. Windows 10 is in second place, and Windows XP, which Microsoft no longer supports, still remains in third place with 9.36% in August, down from 10.34% in July.

Windows 8.1 is in fourth place with 7.92% in August, up slightly from 7.80% in July. Windows 8, which Microsoft also no longer supports, had a PC OS share of 1.82% in August, down from 2.09% in July.