OK so I've spent about 6 hours trying to fix this problem now (any time the phone's plugged in Windows just says "USB device not recognized"), using literally every solution I've seen: Turned USB debugging off, turned it on, typed *#7284# and switched between USB modes, uninstalled Kies, reinstalled Kies, reinstalled just the drivers, removed the SD card, the sim card, tried it in 2 other computers, every USB port available, cleaned the usb port with a toothbrush, I've literally connected this thing in every way possible and changed every setting I've seen anyone recommend and still, nothing. Basically it'll charge via USB but nothing more. I'm running Windows 7 64bit, the phone's on Android 2.3.5. and the annoying thing is all I want to do is update it, I've got no problem using Kies Air for transferring files. So yeah, if anyone has ANY ideas, anything at all that's not been listed then thanks a bunch. I'm probably just going to give up otherwise and stick with what I've got.