Microsoft on Thursday announced its fourth release of Windows 10 to Fast ring subscribers in two weeks. The latest issue, build 10166, continues to build on the “fit-and-finish” of the operating system ahead of its launch on July 29, which is quickly approaching.

The latest release includes a new feature that will work for folks in the Seattle area. It allows folks to buy Wi-Fi access through the Microsoft Wi-Fi application that you can use where the hotspots are available. It’s in testing now, but Microsoft said that it will soon be available to everyone in the United States.

Microsoft said build 10166 marks a time when all should “definitely” upgrade, since it offers the most fixes and the most stable experience for testers yet. The company didn’t dive into the nitty gritty details of what’s included, though everything from the earlier releases last week, such as improvements to the Microsoft Edge browser and Cortana will be included.