Re-install the previous operating system and then run the install from within the old operating system.
It means that end-user will have to be either running the Windows 7 upgrade from within the operating system or by restarting the computer, booting with the Upgrade DVD and selecting the Custom Install option with existing operating system intact.įor user who has already formatted the hard disk drive and wiped off the existing operating system prior to running the upgrade install of Windows 7, Microsoft recommends one of the following steps to upgrade the computer: Officially, Windows 7 Upgrade DVD product key can only be used when the previous qualifying Windows operating system of Windows Vista or Windows XP is currently installed on the hard drive, regardless of activation status. The following failure eccored while trying to use the product key:ĭescription: The Software Licensing Service determined that this specified product key can only be used for upgrading, not for clean installations. The following error may occur when user enter a Windows 7 upgrade version product key after Windows 7 is installed: However, if the user skips and bypass the product key validation by not entering the product key so that Windows 7 installation can continue and finalized, Windows 7 will prompt user to input a product key to activate the system when system is booted up. The first workaround to solve the problem above is NOT to enter any product key during installation,which automatically install Windows 7 as evaluation or trial version lasts for 30 days.
The install was started by starting the computer with the Windows 7 Upgrade DVD.
The computer has been formatted prior to running the install.
An Upgrade version of Windows 7 is used during the install.
If indeed the product key is correct and valid for the edition installed, then the error can also happens and stops installation from continue due to Windows 7 upgrade license requirement, when the following conditions are true: The main reason for the above error to occur if mistyping of the product key, or the product key doesn’t match the version of Windows 7 that’s installed on the computer. When installing and upgrading to Windows 7 from previous version of operating system such as Windows XP and Windows Vista with an upgrade license, media (either Windows 7 ISO image or DVD disc) and product key, the following error message may be displayed when entering the serial key during setup:
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