OK ... there are a few error messages ... the source of the errors are: McLogEvent (McAfee Antivirus), Bonjour Service (Apple), Microsoft Office 12, Windows Search Service, and Application Hang. I checked the properties of each error and nothing seems to me to relate to AutoCAD. Also, if I try to start AutoCad LT 2011, it crashes ... or aborts ... or whatever ... no error is recorded in the Event Viewer/Application log at that moment. Thanks again ...