Strange these thumb files have appeared after downloading avi files and I have managed to delete two of them but the system wont let me delete the last one and norton wont scan it, it said it cant, and if they have something to do with graphics, thats where my problems began today with the graphics driver (the comp totally went scewiff and an error report came up).Thats when my user file went bung. I'm so bloody confused with all of this Oh and no there not zip files, I wont go near those.