iPhoneToday I took a call from someone who had tried to update their iPhone and it has gone wrong on his Windows Laptop. Then he was having problems with loading iTunes. He rang panicking that he has no backups as iTunes had gone funny.
I explained that the backups are stored in another location, and that he should try and reinstall iTunes. Before this I told him though to check he had a recent backup, he looked and he had one today.
The locations are listed below
Windows
C:\Documents and Settings\USERNAME\Application Data\Apple Computer\MobileSync\Backup
Mac
~/Library/Application Support/MobileSync/Backup
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