Win 10 Insider Build 15019

The gaming-focused Windows 10 Insider build that Microsoft promised earlier this week, with Game Mode, Beam livestreaming and other features, is rolling out—but with some game-breaking bugs, unfortunately.

What’s officially known as Build 15019 for the Insider Fast Ring also includes a number of more general improvements, including a version of Edge that will read your ebooks aloud and a better out-of-box experience, complete with voice actors to guide you through the process.

If you’re hoping to try out the new PC-centric Game Mode for yourself, though, be wary: Microsoft warned that unspecified “popular games” may experience crashes or black screens when loading, and clicking on certain elements in a Win32 game may cause it to be minimized (and therefore unplayable) unless killed. Even the new Game Mode will show up as OFF when in fact it’s enabled by default. Also, be aware of one download glitch: The issue Microsoft had with its progress bar is still there, so the download will still show “0% completed” even when it’s actually downloading.

“We recognize that this is painful for those wanting to try out the new gaming features announced this week,” Microsoft’s Insider chief, Dona Sarkar, wrote in a blog post. “We deliberated a lot on whether to release this build to Insiders with these issues; however we decided to go ahead and release it as we need feedback from Insiders on other areas of the OS.”