Hi guys hope someone can help me, i have a tomtom go 520, i had a couple of problems , 1 being that my screen needed calibrating ( press on a letter and a letter 1cm would respond) the 2nd the tomtom couldnt find any satellites, so done a bit of browsing on web and followed instructions to format and start fresh, before formatting i done a backup, then went through the process of doing updates and son, but it seems when it did the new updates it made a new backup and overwrote the original back up, now my problem is that there are no maps installed, and i cannot locate them on my pc, any ideas what i can do pls