PrevX is bringing the fix out because it affects systems using their products. But they're not doing it to be the hero, they're just trying to fix the stuff that MS screwed up with the update. From what I can gather on the bits and pieces available, the update in question changes a bunch of security settings internally, overriding and bypassing some of the more in-depth and extensive 3rd party security products out there. That bypassing then causes serious errors in the protocols of the security products. Microsoft is being very quiet about this, even to the point of virtually ignoring it at times, mostly because they don't want to admit their part in the issue: sure they tested it, but they dropped this big security patch before getting details to the 3rd party companies in a timely manner to allow them to patch their products adequately PRIOR to the update, to avoid these issues. It's really kind of a typical MS blunder, happens alot, but this time it happens to have a dramatic impact, rather than more minor ones that can be easily remedied with a reinstall of a single software package. When you screw something up so completely that people are reinstalling their OS, you should probably rethink your methods a little bit.