Microsoft Change Analyzer
Excerpt:
The Change Analysis Diagnostic simplifies the identification of recent
changes to computers running Windows XP. The diagnostic checks for
recent changes to the following:
• Operating system components, such as patches, that are installed as
hotfixes or downloads from Windows Update.
• Installed application entries listed in the Add or Remove Programs
control panel.
• All kernel mode device and file system drivers.
• Browser helper objects loaded by Internet Explorer.
• ActiveX controls loaded by Internet Explorer.
• Programs loaded automatically during Windows XP startup.
• Programs and Dynamic Link Libraries (DLLs) loaded when an application
starts.
For complete article see:
Microsoft downloads
http://support.microsoft.com/kb/924732