Before posting here, I tried to make sure that I was not violating any rules, having made a similar, unanswered post last Monday in the Widows XP Hardware Forum. I want to know if there is a way to locate file corruption since the Epson Technician to whom I spoke thought that the problem was in Windows. I own a Perfection 1570 Photo Scanner whose Copy function does not work. An error message appears, "A component of the Twain driver is missing." The scanner printed to an Epson Stylus NX300 All-in-one. The two units worked well together until I had to do a clean install of Windows and a System Restore. If the problem is in Windows, where would it be? Is there a default driver I could use in place of the manufacturer?