I just did a clean install of WinXP on my home computer including the latest version of iTunes. I put a check mark next to sync apps and then did a sync of my week-old iPad. Itunes issued a dialog saying that it could not sync the apps because they were installed with another computer and then deleted the apps from my iPad. Fortunately, I was able to reinstall from the iPad store the apps that I had purchased without any additional charge but all settings for these apps appears lost. How do I backup the apps that I have purchased with iPad? If I do a backup without syncing the purchased apps will the purchased apps be backed up? I'm pretty good with computers but iTunes remains a mystery. Thanks.