If that is the case you might try re-installing the drivers for the camera or seeing if newer versions are available on the camera makers website. I use an Apple USB keyboard on my main computer and almost everytime I do a clean install of XP and install SP1 all my USB stuff stops working. I have to go in to hardware manager and delete all the USB drivers then reboot and let it reload them. Then everything works fine. Windows doesn't seem to like USB and Firewire as well as my Macs do.

Keith