At the end of the Knowledge Base Article: Note This article was revised on 4/12/2003 to more accurately reflect the specific purpose and details of the fix. The original title of this article gave the false impression that this was a problem facing many, if not most, Windows XP users who installed SP1. In fact, the problem affects a very small number of customers who are using a privately designed program that exhibits behavior that the hotfix was created to address. (This article was previously published under the title: “Programs Run Slower After You Install Windows XP SP-1”. The contents of the hotfix itself have not changed, only the Knowledge Base documentation was revised for improved accuracy and clarity.