Microsoft has now released Windows 8.1 Update from its Volume License Service Center, along with Windows Server 2012 R2 Update and Windows Embedded 8.1 Industry Update.



From Neowin:

In a blog post today, Microsoft said that VLSC customers can download Windows Server 2012 R2 Update and Windows Embedded 8.1 Industry Update as well. The blog also says that the version of Windows 8.1 Update from VLSC and MSDN does not have all of the fixes that are available in the version accessible via Windows Update. It states, "Therefore, Windows Update and WSUS will offer the Update again to devices that are deployed by using this media."

There's no word on when this will happen, but when it does, the download will be a small one and won't require the full reinstallation of Windows 8.1 Update.

  Windows 8.1 Update now available for Volume License customers