This past Tuesday, as it’s done every second Tuesday of the month, Microsoft released its monthly updates, 9 of them. You can go to www.windowsupdate.com to download and install the latest updates, if your computer is not set to download and install updates automatically.
Adobe just released a patch for the latest known zero-day exploit: http://www.adobe.com/go/getflashplayer
Google Chrome version 17.0.963.56 was just released. Clicking on the wrench icon on the upper right of a browser window and selecting “About Google Chrome” will confirm you have the latest version or download and install it.
The Mozilla corporation released Firefox 10.0.1 to fix a security vulnerability: http://www.mozilla.org/products/download.html?product=firefox-10.0.1&os=win&lang=en-US
It is always recommended to keep computers up to date in their software patches, to avoid security risks that might end up in infected computers.