From Vista Ultimate I tried to install Windows 7 Utimate upgrade but after a long time, I got a message that the upgrade failed. Next I was directed to reverse the upgrade and boot from Vista. Next I ran Windows 7 Upgrade Advisor. Information about upgrading: Windows Mail, Parental Contreols etd not available Upgrade language: English(Unitied States) Language pack detected. I do not need the language pack but I don't how to uninstall from Vista. Next I tried to install Windows 7 by booting from the CD/DVD. I was able to install Windows 7 Ultimate on another drive(empty). I have not registered this upgrade; so I can reverse the install. The failure must not be due to hardware but something else. What caused upgrade failure noted above.