If you dled the update for xp and installed the usb switcher the only thing left to do is try a get it out of devman. You need to open devman goto view<show hidden devices and then do a hotsync. It will probably show up as an unknown or usb device or might even show up as a Sony PEG or Mass Storage device, but it will only be there while syncing. As soon as you see it, right click and uninstall. If it is not showing up try to unplug any other usb devices and DON'T go through a hub. After the device is uninstalled, do another hotsync and it will goto "found new hardware" and it will give you an "Unsigned Driver" screen. Click Continue Anyway and then hotsync again. That should do the trick. If not restart in safe mode and del your usb hubs, uninstall all sony software, del sony handheld folder in program files then go into msconfig and restart in Selective startup w/o Startup items and uncheck non-Microsoft services. Then reinstall the software and go from there. Hope this helps, if you are still having problems, let me know!!!