Here's by problem:
I'm trying to use my brother's iPhone for a while and I want to back it up.
When I try to do so, it takes forever for iTunes to backup.
I just want to backup contacts, SMS and Camera Roll, I backed up contacts into my email using an app, copied all camera roll pictures to my PC and deleted it on the iPhone. I removed all apps, musics, videos. Now the phone only contains some messages and there's no way to back them up and even then the backup gets stuck.
Further problem: somewhere on the apple forum someone recommended using command "netsh winsock reset" in command prompt… I used it, restarted my PC and iTunes no longer finds my iPhone even though it is successfully connected to my PC
More details:
iPhone 4S, iOS7, Windows 7 Desktop.
Added (1). I have deleted all games, apps, musics, videos… This is some error.