Application not installed because it is not signed

None of my music or videos would show up on my iPhone 4, so I am trying to restore it but now no applications will install back on the phone. It gives the error "Application not installed because it is not signed" for 69 out of the 72 apps I am trying to re-install after a restore from iTunes. Any suggestions please.

I acquired my Verizon iPhone less than two weeks ago and had the same problems reported here - many, many "...Application not installed because it is not signed" errors. On following the Apple Troubleshooting advice, iTunes deleted everything I had downloaded on the iPhone.
After reading this thread, I turned off my network card and then turned off Zone Alarm. This time, everything sync'd on the first try.
Yes, it ***** to have to do that, but you don't have to REMOVE your ZoneAlarm; just disable it temporarily to get the sync done. It is a pain, yes, to not be able to use the computer to connect to the Internet for that 15 minutes or so, but if you do it right you won't be at risk and you'll be able to back up your phone/load music and etc.
Until ZoneAlarm fixes itself, this is our best option.

Similar Messages

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    These are ordinary apps, such as facebook.
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    The Capacity bar in iTunes is showing a large amount of 'other' data being stored on the phone. Its as if the apps are being transfered to the iphone from my PC, but just not being enabled.
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    If you are seeing alot of "Other" in the capacity there is a issue with the software you loaded onto the phone. When you did the restore did you restore from backup?
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