I went to sync with iTunes and tried to update to os5. It said I had to upgrade to iTunes 10.5. I tried but it said I was missing an .msi file. I un-installed iTunes and re- installed. Now all my playlist and apps are not listed in iTunes and it does not sync with my iPad. It says that this iPad cannot be used because the required software is not installed. It says to run the installer to uninstall and then reinstall. I did and still same story. I have been at this for 3 days. I am ready to try dynamite.