A (previously optional) patch being applied when none of the scenarios that the patch is supposed to address are present? It's one thing to update binaries that may eventually be used if any of that scenarios should ever apply, but clearly something changed in the boot loading process of all Win7 systems that this update was installed on (and it would apply to every Win7 system with default WU settings), which is obviously a very risky thing to apply to millions of systems worldwide, especially when the systems that this patch might improve anything for are maybe 1% of current Win7 systems.