I use ArcGIS at work several times a week. Yesterday I was not able to open the map that I have been working consistently over the last few months. In fact I am not able to open ANY .mxd, no matter how I try to open it (start up page or windows explorer). I get the same error each time: "Opening the selected ArcMap document failed. An unexpected error occurred while loading the map document. The last successfully loaded component was:... The specified file does not contain a valid ArcMap document" I know they are not corrupted files because co-workers can open these maps from their workstations. I am the only person at work having this issue and we all run off the same license. Any suggestions? Thank you!