News.com reports that Microsoft sent out a dozen security fixes on Tuesday to fix 21 flaws in its software. All but two of the patches fix major security holes. According to the Vulnerability Management Lab, never before has there been a Microsoft security upgrade that has addressed so many flaws, especially this many that would allow an intruder to insert malicious code onto another computer. Four of the essential updates address security holes that could allow remote control of all versions of Windows. Ultimately, the updates address a variety of issues with Internet Explorer, Windows Media Player, Microsoft Office, and Outlook…