[ryuuu]

hast du die neueste itunes version`?

auch mal virenscanner und firewall ausschalten und usb port direkt am bord nutzen, keinen hub. wenns trotzdem nicht geht mal an nem sauberen rechner versuchen.

und host mal in urzustand bringen

# Copyright (c) 1993-2009 Microsoft Corp.
#
# This is a sample HOSTS file used by Microsoft TCP/IP for Windows.
#
# This file contains the mappings of IP addresses to host names. Each
# entry should be kept on an individual line. The IP address should
# be placed in the first column followed by the corresponding host name.
# The IP address and the host name should be separated by at least one
# space.
#
# Additionally, comments (such as these) may be inserted on individual
# lines or following the machine name denoted by a '#' symbol.
#
# For example:
#
# 102.54.94.97 rhino.acme.com # source server
# 38.25.63.10 x.acme.com # x client host

localhost name resolution is handled within DNS itself.
127.0.0.1 localhost
::1 localhost

kannst du einfach kopieren und einfügen. danach rechner neu starten nicht vergessen