In my opinion, Umax scanners are junk. I have had 2 Umax scanners, and both had that grinding noise when scanning. Also, both scanners had a fog that covered the inside of the glass. Their software is as buggy as a swamp in the Everglades. Check out the Epson scanners. I just swithched from a Umax to the Epson, and there is no comparision.