Dear Pamela I have had my Book Port since June 2007. It is the old model, with a braille keyboard option and powered by non-rechargeable AA batteries. It still works fine and I prefer the batteries because I can always pack spare batteries when travelling, whereas I cannot always find a compatible power supply to hook up to. I also make frequent use of the Braille Search facility in this model. I have recently changed my PC and, in the process, exchanged Windows XP for Windows seven. I still have the installation CD for the Book Port, but cannot make it work on the new system. Can I remedy this loss which means that, for the time being, I am unable to transfer text from my PC to my Book Port? ATB Harvey White