Microsoft last week restarted deliveries of Windows 10 to beta testers, weeks sooner than it has resumed previews in the past.
Windows 10 build 16170 was released Friday to the Insider program’s “Fast” track, one of three that testers can select. It was the first for the operating system’s next feature upgrade, which Microsoft has promised will debut in 2017 but has not scheduled.
The appearance of build 16170 preceded the launch of Windows 10 Creators Update, also known as 1703 in the company’s yymm nomenclature. Creators Update is to begin reaching customers tomorrow through Windows Update, but has been available for manual downloading since April 5.