Remember when Google announced that they were going to stop censoring search in China in response to cyber attacks against Google originating in China, then it turned out a vulnerability of Internet Explorer was to blame? Today, Microsoft released a ton of patches for every version of Internet Explorer from 5 to 8, across every version of Windows from Windows 2000 to Windows 7, to address that vulnerability.
The patch is available on Windows Update, but if you'd rather, you can grab the update directly from Microsoft's website. For a full list of platform-specific downloads, check out the Microsoft Security Bulletin. [Microsoft via Bink.nu]