When I sync my iphone I get a popup that says 'ABAssistantService quit unexpectedly'. I can 'ignore', 'Report' or 'Reopen'. The popup comes right back after a few seconds no matter which option I choose. The only way to make it stop is to reboot the compu

When I sync my iphone I get a popup that says 'ABAssistantService quit unexpectedly'. I can 'ignore', 'Report' or 'Reopen'. The popup comes right back after a few seconds no matter which option I choose. The only way to make it stop is to reboot the computer. Any ideas?

iTunes places the .ipsw file here:
OSX:
~/Library/iTunes/iPhone Software Updates
XP:
C:\Documents and Settings\[username]\Application Data\Apple Computer\iTunes\iPhone Software Updates
7 &Vista:
C:\Users\[username]\AppData\Roaming\Apple Computer\iTunes\iPhone Software Updates
Find and delete any and all .ipsw files on your computer. There should only be one, but delete all that you find. Next, disable ALL firewalls & security software on your computer. Connect your phone, iTunes running & restore from backup. Follow this by syncing your content back to your phone.
This will force iTunes to re-download the .ipsw file, as I suspect yours is corrupt.

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