i just bought a 8gb iphone from a friend who canceled their service. so as i have come to learn (i am new to all this) my phone is activated and unlocked legally, without myself having to sign with at&t. anyways, every time i plug the phone into my computer (windows xp), i get a blue screen saying that an error has occurred and that my computer was shut down. the first time this happened, i tried about 4 times, until finally, it did not **** down and i was able to sync my music, etc. now that i want to update everything via itunes for the second time, it keeps crashing when i plug it in. i don't know if it could be a problem with the phone or with my computer. any help would be really appreciated. thanks.