Okay, so I have my iPhone and I've purchased apps on it from the store. When I go to sync the apps, it shows up with a message to authorize my computer or else the apps will be deleted so I enter the password to authorize it. Then, I get this message: "There was an error storing your authorization information on this computer. Try doing a repair install on iTunes from the "Add or Remove Programs" control panel." So I go to repair iTunes and it says that the feature I'm trying to use is on a network resource that is unavailable. So how do I repair iTunes so I can authorize my computer so I can sync my apps to the computer?