Currently Being ModeratedMay 6, 2012 7:00 PM (in response to KonigstigerAlex)
Close your iTunes,
Go to command Prompt -
(Win 7/Vista) - START/ALL PROGRAMS/ACCESSORIES, right mouse click "Command Prompt", choose "Run as Administrator".
(Win XP SP2 n above) - START/ALL PROGRAMS/ACCESSORIES/Command Prompt
In the "Command Prompt" screen, type in
netsh winsock reset
Hit "ENTER" key
Restart your computer.
If you do get a prompt after restart windows to remap LSP, just click NO.
Now launch your iTunes, Sync and see if it is working now.
If you are still having these type of problems after trying the winsock reset, refer to this article to identify which software in your system is inserting LSP:
iTunes 10.5 for Windows: May see performance issues and blank iTunes Store
Currently Being ModeratedMay 7, 2012 11:34 PM (in response to KonigstigerAlex)
You're very welcome.
Most of the Internet connectivity problems arise out of corrupt Winsock settings. Windows sockets settings may get corrupted due to the installation of a networking software, or perhaps due to Malware infestation. You will be able connect to the Internet, but the packets won't transfer back and forth. "netsh winsock reset" command will reset your Windows TCP/IP to it's default state.
During your Backup stage, iTunes needs to communicate with Apple's secured server to verify your AppleID and necessary information. Without smooth connectivity, it just got stuck and no way to proceed further.