The Windows 10 Technical Preview has been out for only three weeks, and already, Microsoft has pushed out an updated build to testers. Known as build 9860, the update weighs anywhere from 2GB to 2.74GB "depending on CPU architecture and language," and it adds Action Center, that new notification pane we saw in leaked videos a little while back.
Here's the lowdown from Microsoft:
Action Center for Windows PCs. As we shared when we announced Windows 10 in September, we aren't limiting our view to one specific device type. We are looking across our entire product family to look at ways to bring great experiences to our customers across different devices. So with this build, we're bringing "Action Center" from Windows Phone over to the PC as the place where you can see and follow up on all actionable items. This build is focused ONLY on enabling basic notifications – quick actions and cleaner UI will come later. You'll see notifications from the system and apps – from new emails and invites to IMs, Facebook posts and more – all in one place, so you don't miss a thing. Click on the new Action Center icon in the notification area of your taskbar to check it out.
The new build also adds an animation for desktop switching in Task view, and it enables a not-so-new keyboard shortcut. On a multi-monitor setup, hitting Win+Shift+[arrow] should now let you move a window from one monitor to another. This shortcut actually works on Windows 8.1, but weirdly, it was disabled on the original Technical Preview build.
To update to build 9860, simply head on over to Windows Update from within the Technical Preview. Or just wait. If it hasn't already, the new build should download and install itself automatically.