Most Windows users know the importance of applying Microsoft security updates for Windows, Internet Explorer, and Microsoft Office products. The second Tuesday of the month is "Patch Tuesday," when Microsoft regularly releases its updates. Microsoft's Security Central web page includes links to the latest security updates and other security information. It is equally important to promptly install security updates for other operating systems, browsers and application software. For example, Adobe recently released a security update for Adobe Reader and Acrobat. According to the Security Bulletin, it addresses critical vulnerabilities that could allow an attacker to take control of an affected computer when these products are used with Windows XP and Internet Explored 7. The exploit could be installed when a user opens a malicious PDF file. Apple, Mozilla, and Skype have also recently released security updates. It is critical to address everything installed on a computer.