Amy
Please try what I suggestered in my last message. It does not really matter if you cannot remember the exact time the last error occurred.
Using the filter as I suggested will reduce the number of reports you see dramatically. Using the sort feature on Date and Time wil put the latest Error at the top of the list. Let's start there.
The suggestion by Andre could enable him to pinpoint the error more precisely than what I am suggesting but it could involve features in Windows 7 you may not be using. This could therefore be a steeper learning curve than my proposal. If you can post the right error report from Event Viewer we would know a lot more about the nature of the problem to be resolved.
Hope this helps, Gerry Cornell