I have windows XP I installed iTunes and it works fine. Im able to download/purchase etc. When I connected my iPhone for the first time it made my computer reboot repeatedly. I have spoke to Apple Tech support and they have done all they can and believe its a computer issue. I have uninstalled/reinstalled itunes, I have connected my phone to another pc with itunes and was able to download music no problem. I have tried all available usb ports on my computer. I have scanned, cleaned, and defragged. I have 61% of my memory available... any other suggestions?