Do you ever deal with clients that say that suddenly the computer is acting weird. After pressing for more details they say "I didn't do anything", "Just all of a sudden"....
Well MS has come out with the Change Analysis Diagnostic tool for Windows XP.
Direct Download from here
After installing, reboot.
The go to start, Run , statechangediag.exe.
The program asks for a period date to analyze and generates an XML file your review (in IE).