I have a Windows work computer that I want to copy my iPod music to. I plug in my iPod and iTunes sees it - but iTunes doesn't see any other music on my work computer. I go to File/Transfer Purchases and it tells me that it can't copy my purchases because I am not authorized to play them on this computer. So I authorize this computer again. iTunes says the authorization was successful, with 2 of my 5 authorizations. (Which is odd - I have my home Windows machine as my primary - my wife's iMac is authorized as well). So I try again, get the same result. I authorize again, with the same result. This process is continuous. I want to copy over my ripped CD music as well. My iPod is set up to be a hard drive, so I suppose I can find and copy the music - but I want to do so safely - last time I tried this, iTunes created the blue screen of death.