A search of this site did not find any previous posts pertaining to the Epson Perfection Pro 4990 Photo model. Mine worked fine for a short while and it is an awesome machine. But now I have a software problem. Some functions work with some programs, but the Epson Scan cannot be opened. It is the one for scanning photo negatives (up to 8 x 10!) and slides plus much more. I have tried all the suggested fixes.