When that error message comes up, click the blue link by "To see what this error report contains - click here". Need to know the App name and Mod name.
Or go to this article - Description and Availability of Internet Explorer Error Reporting Tool http://support.microsoft.com/default.aspx?scid=kb;[LN];Q276550 - scroll down for how to disable the Error Reporting Tool, and then let Windows capture the error the next time. There will then be an error box with a Details button. Need to know the XXXX caused a YYYY in module ZZZZ part. You can leave out the stack dump numbers. Also need to know the version of Windows the user is running.