Adobe recommends users update their software installations by following the instructions below:

Adobe Reader

Users on Windows and Macintosh can utilize the product's update mechanism. The default configuration is set to run automatic update checks on a regular schedule. Update checks can be manually activated by choosing Help > Check for Updates.

Adobe Reader users on Windows can also find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=10&platform=Windows

Adobe Reader users on Macintosh can also find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=10&platform=Macintosh

Adobe Acrobat

Users can utilize the product's update mechanism. The default configuration is set to run automatic update checks on a regular schedule. Update checks can be manually activated by choosing Help > Check for Updates.

Acrobat Standard and Pro users on Windows can also find the appropriate update here:

http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows

Acrobat Pro Extended users on Windows can also find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Windows

Acrobat Pro users on Macintosh can also find the appropriate update here: http://www.adobe.com/support/downloads/product.jsp?product=1&platform=Macintosh