Error message when you try to use an upgrade product key to install Windows Vista from the Windows Vista DVD: "To use the product key you entered, start the installation from your existing version of Windows"
SYMPTOMSWhen you try to use an upgrade product key to install
Windows Vista from the Windows Vista DVD, you may receive the following
message: To use the product key you entered, start
the installation from your existing version of Windows. CAUSETo use an upgrade product key, Setup.exe must be run within an
existing operating system that meets the upgrade compliancy check. For example,
Windows XP meets the upgrade compliancy check. Therefore, Setup.exe can be
run within Windows XP. Note There is no prompt to insert a compliant CD or DVD of the legacy operating system that allows for setup to continue. RESOLUTIONTo resolve this issue, start the existing copy of Windows,
run setup, and then enter the upgrade product key. If you do not have an
existing copy of Windows that is available on the computer, you must reinstall a legacy
copy of Windows that meets the compliancy check. Or, you can obtain a full
package product key, and then you can install Windows Vista from the Windows Vista
DVD. MORE INFORMATIONUpgrade media is the compliance checking product
(CCP). The full packaged product (FPP) does not require an upgrade compliancy check. The Windows Vista Retail media contains all the stock keeping units (SKUs). The CCP media and FPP media are the same except for the product key. APPLIES TO
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