Are you experiencing problems on your PC such as hangs or crashes? Here is
one possible way to see what is causing the trouble. Take a look at the
Reliability Monitor that comes with Windows 7. For example, if you have had a
Blue Screen of Death (BSOD) crash, you may not have gotten a chance to record
the error messages. But you can retrieve the data from a BSOD in the
Reliability Monitor history. It also can help you find out if a particular
application has issues. It displays a timeline for various system events and
divides them into failures, warnings and information.
http://www.techsupportalert.com/content/how-find-out-what-causing-problems-your-windows-7-pc.htm