My iphone 4s wont sync properly.

Hey, ok this is what happened:i don't remembered when was the last time i've plug my iphone in my computer(i'm using windows) before this happens, maybe it was two weeks before when my aunt reformated my computer(She have a backup the commonfiles/apple folder, c:/programfiles/itunes folder, apple software folder, and ipod folder). Then after i went home i plug in my iphone 4s and noticed that it was reformated, what i did now is i downloaded itunes 10.6.3.25 and remembered that if I sync my iphone now it will lost all of my apps and songs, so i told my aunt about it, She began putting and replacing the files she had backuped and then sync my phone in. She then now authorized the computer then transfered all purchased from my phone to my computer(and before that i thought i was losing all my apps and i began downloading all of it again).

 

Now here is my problem. itunes can't sync to my phone properly, it just sync up to step 2. then nothing happens, it then now stop syncing. i've check the sync apps in the apps tab, when i sync, in the itunes it shows the new apps that i've downloaded in itunes but doesn't show in my iphone(it don't show sign of copying the apps when i sync, and again it is still stops at step 2, the "preparing to sync" part).i could still use my iphone i could still play/listen to music with it but sometimes it shows a message that is kinda like this " Iphone hasn;t been backup...". When i click the "Backup to this computer" nothing happens. it will go back to "back up with icloud".

 

And also, could i add song to my phone even if the "manage songs and movies manually" even if it's not check? because i don't have any backup to it.

 

Is there any solution to my problem without deleting my apps and songs?(if none, then i'm fine with deleting all my songs and apps)