Service Pack 1 for Windows Vista is an important update for Windows Vista. Windows Vista Service Pack 1 (SP1) contains many security, reliability, and feature updates for Windows Vista. A program may experience a loss of functionality after you install Windows Vista SP1. However, most programs will continue to work as expected after you install Windows Vista SP1.
This article lists programs that have been reported to experience a loss of functionality when they are installed on a Windows Vista SP1-based computer.
Source : support.microsoft.com/kb/935796/en-us
