January 2011: A reliability update that wasn’t
On January's Black Tuesday, Microsoft pushed a nonsecurity patch into the automatic update black hole. Known as KB 2454826, Microsoft claimed it was a "performance and functionality update." Details about the patch at the time were sketchy, but the 0x7F blue screen crashes weren't.
Microsoft's advice: Manually uninstall the patch. That's your reward for turning automatic updates on, bucko.
It wasn't until the next month that we discovered the real reason why Microsoft pushed this nonsecurity patch out the Black Tuesday chute: It's a prerequisite for installing the Internet Explorer 9 Release Candidate, which Microsoft was flaunting at the time.