The Change Analysis Diagnostic tool scans the computer and displays recent changes to the following areas:
- Software programs: The software programs that are listed in the Add or Remove Programs item in Control Panel.
 - Operating system components: Hotfixes and downloads from Windows Update.
 - Browser Helper Objects (BHOs): COM components that Internet Explorer loads when it starts. BHOs can intercept browser events, access Internet Explorer controls, create windows, and install add-ins that monitor messages and actions.
 - Drivers: Kernel-mode device drivers and file system drivers.
 - ActiveX controls: COM controls that have been downloaded by Internet Explorer or that are used in some Web pages.
 - Other Auto-Start Extensibility Points (ASEPs): ASEPs let programs start without action from the user. An ASEP may accept one or more ASEP hooks, each of which is associated with a program.
 
The tool also displays changes to loaded applications and startup objects.
This is a new Microsoft's tool.
More infos : www.microsoft.com/technet