As you may or may not know, Microsoft releases patches every second Tuesday of the month so that businesses can plan on having a regular update schedule.
This week Microsoft released two critical patches one for Internet Explorer and the other to fix code generated by Visual Studio. Since this is outside of their normal release cycle, it's definitely time to patch your PC.
And while you are at it, surf on over to see if you're running the latest Java and Adobe software. As Windows continues to make progress on the security front, hackers have been adapting by using vulnerabilities in Java, Acrobat and Flash; and they also use many others, like QuickTime, so it goes a long way to check that software you use is the latest release.