My applications aren't working nor able to download new apps

Jan 6, 2012
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I just got a iPod touch 4th gen and synced to my iTunes on the computer and there was a window that popped out saying something like "applications could not be transferred to this computer...." so now my apps wont work. I tired to redownload them again but it would not download. I already restored/reset my iPod touch and uncliked sync apps whenever i plug it to the computer. Does anyone know what to do?