Thanks for the reply Bund. have a slight challenge upgrading as i can't switch the laptop off as the on/off switch is broken. The slight challenge i had was that i couldn't format it as FAT32 as the laptop wouldn't let me. Went to an Apple place and they formated the hard drive for me using the lastest version of Apple so hoping i can use it with both pc and ibook but if i can't, then i'll get all the info off the ibook using memory sticks and bin the laptop. we do have a G4 with a more uptodate apple version but once the secretary leaves in April, i think that one will go as well.