DigiTimes has reported that Microsoft’s free update for Windows 8 is estimated to arrive in October 2013.
Sources from related ODMs told the site that notebooks featuring the update (codenamed Windows Blue) are set to start volume production in mid-September with the official launch happening late October.
This is the first major update for Windows 8 and it is rumoured to include a solution to Windows 8’s lack of a start button.
A preview version of the OS will be opened to the public at Build 2013 on June 26th.

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