This is for my wife's laptop. We bought it with Vista installed and the option of a free upgrade from Dell to Windows 7. I followed both supplied disks including removing the McAfee Anti-Virus, Itunes, Google Toolbar and proceeded with the upgrade. This ran for about 2 hours at the end of which it indicated the install coudl not contiue and it set everything back but there was nto other inidcation other than the message statign that the upgrade could not contirue. Everything prior to this indicated that this computer was compatible with this upgrade without any issue so I am bewildered by what happened. This never asked me for the product key at any time even though it had indicated that it had already loaded windows 7 on the hard disk. Any assitance would be greatly appreciated.