On Tuesday, Microsoft will make Windows 8.1 Update available. To continue to get patches, 8.1 users need to move to it soon.
Microsoft pushes the spring update for Windows 8.1 into RTM mode and sends it to PC partners, according to The Verge and Russian leaker Wzor.
Microsoft's Siri rivals shows off its abilities in a two minute leaked video.
Windows 8 RTM software is ready to go out to manufacturers ahead of the October public launch.
Microsoft announced today that its next Windows milestone has been released to manufacturing (RTM), hitting its previously announced "first week of August" schedule.
Microsoft's Windows 8 development is done, and the OS is off to PC makers. Some users will be able to get the final bits within days. Also RTM'd: Windows Server 2012, Visual Studio 2012, and IE10.
Windows 8.1 Update 1 could include some under-the-hood changes to reduce memory and disk space requirements for cheaper tablets.
One Web site claims the spring update to Windows 8.1 won't just be a traditional service pack.
Microsoft continues to flesh out its Bing developer platform with a new speech-recognition control, allowing coders to add speech input to their Windows 8 and Windows 8.1 apps.
Those running Windows 8 will be able to get Windows 8.1 for free. But 8.1 will cost everyone else between $119.99 and $199.99 (for Pro).