Adobe has released a critical security update for the Adobe Reader and Acrobat products. If you can view PDF files, chances are high you may be vulnerable.
To update your computer, check to see if there is a red Adobe icon down in the system tray by your clock. It may already be trying to tell you to update! Double-click on the icon if it is there, and the following screen will appear:
Simply click “Download” or “Update” and follow the prompts to keep your computer up-to-date.
If there is no red Adobe icon in your system tray, simply launch Adobe Reader or Acrobat, click on the “Help” menu, and select “Check for Updates…”.
When you are done with the update, you will be required to restart your computer. Timing this with a lunch break (or any kind of break for that matter) is a good way to apply this update with the minimum amount of inconvenience.
A bug was identified where opening a specially crafted PDF file could crash your computer, or run programs without your knowledge. Technical details regarding the vulnerability can be found at http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2011-0611