The
Windows Customer Experience Improvement Program helps Microsoft improve Windows. Without interrupting you, it collects information about your computer hardware and how you use Window. The program periodically downloads a file to collect information about problems you might have with Windows. The information collected is not used to identify or contact you.
Windows 7 Privacy Statement - Microsoft Windows
This will show you how to join or unjoin the
Windows Customer Experience Improvement Program (CEIP) in
Windows 7.