Microsoft may have released the final version of Windows 10 last month, but the company is pressing ahead with updates to the operating system. Windows Insiders, testers of Windows, can now access a new preview build of Windows 10 with some minor changes to provide feedback on. Microsoft says it has received a lot of feedback over the color options for Windows 10, and the company is testing a new default color with this new 10525 build of the OS.
Microsoft is also testing out memory improvements to Windows 10 that allow reduce the amount of memory used per process, allowing Windows 10 to keep more applications in physical memory at a time. That should mean less modern apps having to resume after you haven't used them in the future.
While there are new features to test, Microsoft warns that some bugs have been introduced with this latest test release. Mobile hotspot doesn't work with this build, and an update to the Movies & TV app will be required to fix a video playback issue. If you require optional language packs for Windows 10, these will be available later this week for this particular preview release. Microsoft is planning to test Microsoft Edge extensions and a new Messaging application in upcoming Windows 10 preview releases in the coming weeks.
Verge Video: Windows 10 review