I had to install a new hard drive on my macbook air and now I am getting unkown error whenever I try to login to itunes. Apple support suggested I reset my password so I did that and still the problem is occuring. Itunes and the app store are working normally on my ipad and iphone. Does anyone know what the problem is. The new disk was installed in France coz I am on holiday there. could there be something I need to change in my settings? I need help urgently as I am trying to finish an assignment and need to be able to access and download from icloud.