Windows is transitioning from something that you buy once every few years to a service that's updated on a regular basis. Windows 10 has only been out for a few weeks but already Microsoft's got the follow-up ready for selected users to test. If you're a member of the Windows Insider program, you can now get a look at Preview Build 10525 which'll land on your desktop automatically via Windows Update. The two most notable tweaks enable to you tweak the color of the taskbar as well as greatly improved memory management. On the downside, video playback and internet sharing are broken for now, so if you're interested in updating, just remember that you do so at your own risk.