This update resolves an issue that can cause some third party software to behave unexpectedly after the installation of the Works Suite 99, Encarta Encyclopedia 99 (U.S. only), Encarta Virtual Globe 99, Graphics Studio Greetings 99, and/or other third party software. Note: This update works on all language versions.
Installing this update will prevent some existing applications and new versions of third party software from crashing because of incompatiblity between some Microsoft applications and third party software.
Microsoft strongly recommends that all customers download and install this update.
For more information, please read the Knowledge Base article Microsoft Libraries Update: What, Where, Why.