The latest version of Windows 10 is now running on 38.1 percent of PCs, compared to 36.1 percent for its immediate predecessor.

“More than 38 percent of [Windows 10- and 11- based] PCs run [Windows 10 version] 21H1 and 1.3 percent are already on Windows 11,” the latest AdDuplex report notes, adding that the data is based on a survey of about 60,000 Windows 10- and 11-based PCs.

Windows 10 version 21H1 has seen the biggest jump since the last report, from July. (AdDuplex didn’t publish a Windows 10 usage report in August.) At that time, it was on just 26.6 percent of PCs. Windows 10 version 20H2 usage, meanwhile, declined almost imperceptibly, from 36.3 percent in July.

Oddly, Windows 11 usage hasn’t moved much at all, either: It was at 0.9 percent usage in July. It now accounts for just 1.3 percent usage just ahead of its October 5 launch.