Just tonight, I did an upgrade on my IPad (Gen 1) from 4.3.3 to 4.3.4. I also upgraded ITunes to the current version. In the process of it all, I lost every single app that I had on my unit. About a week and a half, ago, I had upgraded the OS on my PC to Windows7, from Vista, and I believe that the program (ITunes) is reading my computer as a new system, because of that. I attempted to Authorize my PC, but had no success in doing so. Though I must have done it, I cannot (for the life of me) remember setting up an Apple ID, and I cannot find any other avenue by which to get me apps back. Any help, here, would be most appreciated.