Sometime back a Windows 8.1 Escrow RTM Build had leaked giving rise to the hopes of the RTM sign-off happening soon. And, it has already happened it seems. WZor has posted screenshots and the Build number which is the final RTM version to be released to manufacturers.
FEBRUARY 26, WINDOWS 8.1 SPRING UPDATE 2014 SIGN-OFF GOLD RTM. 6.3.9600.17031.WINBLUE_GDR.140221-1952 is now FINAL and Signed Off !!! by WZT
We brought to you a report which claims Windows 8.1 Update 1 release on April 8 and hitting MSDN on April 2nd.
At MWC 2014 , Joe Belfiore from Microsoft has talked about the changes that this update is supposed to bring. Lots of those changes go in enabling low-cost hardware and UI improvements targeted at making life easier for mouse and keyboard users. You may like to see the update in action in the demo video by clicking here. Joe Belfiore has also mentioned release date of Spring for the update.