After the installation of Windows 7, I cannot use my mp3 files (the majority of them). I tried with Windows Media Player and other players, but the error message is always "Impossible open the file or similar) It looks like I dont have tha access or the authorization to do it...but these are the MP3 i have always listened...and they are ondrive c.Anysuggestion?THX

You may need to take Ownership of the files, especially if yo marked said folder as "Private" (I.E. no one else that has access to this computer can access the folder, except you). When you re-install the OS, it creates a different UID # for that account. Please check out these articles: http://support.microsoft.com/kb/308419 This one is for XP, but the principal is the same: http://support.microsoft.com/kb/810881/en-us

Hi Rob,THX for your suggestion. I tried with no results, and at the end trying many things, i have solved changing the authorization of this user: MPNetworkSvc which I have found in the list....Not clear, but it works....THX