An update has been released (or re-released) that fixes an issue described in Microsoft Security Advisory 2871690. The fix, targeted for Windows 8 and Windows Server 2012, patches an issue where non-compliant third-party modules could load prior to the UEFI Secure Boot process.

Per the Advisory, the re-release…

…addresses an issue where specific third-party BIOS versions did not properly validate the signature of the original update.

Here's the downloads for the updates:

x86-based versions of Windows 8

x64-based versions of Windows 8

x64-based versions of Windows Server 2012