Error in restore backup 'bcoz an error occured'

I have a problem with restore backup. I recently update my iPhone 4S to 6.1.2 from 6.1.1, After which I lost all my photo's, messeges, contacts and all settings. I would like to retrive my pic's n messges and also I can see there is a backup file saved on my computer when i enter %appdata% and run. I can see 34GB data is in it. However I am not able to retrive anyof the pic's and messges when I am doing restore backup. Error comes backup could not done "Bcoz an error occured" at the end of process. Please some one help or guide.