Microsoft is releasing a set of patches for all of its currently supported versions of Internet Explorer. The major flaw was discovered last weekend, so Microsoft has moved quickly to react to this particular vulnerability outside of its normal Patch Tuesday. The security updates will be available on Windows Update at 1PM ET today. While Microsoft may have killed off support for Windows XP last month, the company is taking the highly unusual approach of releasing a security update for its nearly 13-year-old operating system today.