IPhone Backup not restoring correctly

Question

Before I updated to iOS 7 I've created a backup in iTunes and restored my iPhone 4 to iOS 7 (because I had not enough space for an Over-the-Air Update)
after this I restored with an iTunes Backup after few hours it stops, all Photos were synchronized but 5 Apps and 70% of my Music Library weren't synchronized
If I unplug my iPhone and plug it again it will try to continue the Backup Synchronization but will fail at the same point
on my iPhone I cannot download Apps or Updates
I've already tried to restore it again
In the iTunes Log Files I've found in the "MDCrashReportTool.exe begins" bracket something that is maybe interesting:
[5940 @ Sat Sep 28 18:05:59 2013] [(unknown facility) iTunes.exe] AMDeviceSecureTransferPath (thread 6536): disableDelta: FALSE
[5940 @ Sat Sep 28 18:06:42 2013] [(unknown facility) iTunes.exe] AMDeviceSecureTransferPath (thread 1080): disableDelta: FALSE
[5940 @ Sat Sep 28 18:07:58 2013] [(unknown facility) iTunes.exe] AMDeviceSecureTransferPath (thread 916): disableDelta: FALSE
[5940 @ Sat Sep 28 18:08:13 2013] [(unknown facility) iTunes.exe] AMDeviceSecureTransferPath (thread 6800): disableDelta: FALSE
[5940 @ Sat Sep 28 18:08:28 2013] [(unknown facility) iTunes.exe] AMDeviceSecureTransferPath (thread 6696): disableDelta: FALSE
[912 @ Sat Sep 28 18:22:17 2013] [YSLoader MDCrashReportTool.exe]

Answer 1

Your backup is obviously corrupted or your internet connection is bad. Regardless, something is definitely wrong...your phone is not going to restore. Eject your phone, then:
See if you can force the phone into recovery mode:
Leave the USB cable connected to your computer, but NOT your phone, itunes running, press & hold the home button while connecting the USB cable to your dock connector, continue holding the home button until you see “Connect to iTunes” on the screen. You may now release the home button. iTunes should now display that it has detected your phone in recovery mode, if not quit and reopen iTunes. If you still don’t see the recovery message repeat these steps again. iTunes will give you the option to restore from a backup or set up as new. In your case, select setup as "new".