03-25-2010, 07:29 PM
Retail version of Windows 7 has two main primary type of licenses – full or full package product (FPP) and upgrade, where the most obvious differences between full and upgrade versions are different prices for full and upgrade license, and customers have to possess an existing Windows license to be eligible for upgrade license.
Officially, Windows 7 Upgrade version only allow an user to “upgrade” from a previous version of Windows operating system, via “in-place upgrade” or custom install, which replaces old Windows. Even if upgrade path from some versions of older Windows cannot perform “in-place upgrade”, and require user to perform a custom clean install, but it only means that user has to start the Windows 7 installation from within an existing Windows, and choose “Custom Install” during the course of Windows 7 setup.
Windows 7 Upgrade license wants to see an installed and activated copy of Windows XP or Windows Vista before installation is allowed. As Windows 7 setup does not ask for an existing CD or DVD disc of Windows, thus if user full formats and wipe XP or Vista installation so that the drive is empty and blank before using the upgrade disc, setup no longer able to see any existing installation, and will return “Invalid Product Key” error message.
Tip: User is allowed to create or delete hard disk drive or partition during the setup through Custom (advanced) -> Drive options (advanced) option (note: a 100 MB system reserved partition may be created by Windows 7 Setup), or let Windows 7 install wizard backup the existing Windows files to Windows.old directory, and then delete and wipe clean the whole partition volume prior to install Windows 7.
Many people believe that Windows 7 FPP (full version) disc media or ISO is different from ISO image or disc media of Windows 7 Upgrade version. In fact, the Windows 7 Upgrade disk and Windows 7 FPP disc may be similar, if not completely the same. Only product key represents the actual version of license bought, and Windows 7 will validate against the product key, as shown by Microsoft Product Key Checker.
Not everybody has a PC readily installed with a Windows for upgrade. And more people does not have time to install an operating system especially the time-consuming Windows Vista just to install Windows 7 Upgrade version. Good news is that Windows 7 upgrade media or ISO image and product keys can be used to perform clean install or custom install on a blank and emtpy PC without any prior OS installed. With the following clean install hacks or custom install tricks, which not only save the headache of users who need to install on a new or clean computer system, but also mean everybody just need to purchase an Windows 7 upgrade license, which costs up to $100 cheaper over a Windows 7 full edition price.
Officially, Windows 7 Upgrade version only allow an user to “upgrade” from a previous version of Windows operating system, via “in-place upgrade” or custom install, which replaces old Windows. Even if upgrade path from some versions of older Windows cannot perform “in-place upgrade”, and require user to perform a custom clean install, but it only means that user has to start the Windows 7 installation from within an existing Windows, and choose “Custom Install” during the course of Windows 7 setup.
Windows 7 Upgrade license wants to see an installed and activated copy of Windows XP or Windows Vista before installation is allowed. As Windows 7 setup does not ask for an existing CD or DVD disc of Windows, thus if user full formats and wipe XP or Vista installation so that the drive is empty and blank before using the upgrade disc, setup no longer able to see any existing installation, and will return “Invalid Product Key” error message.
Tip: User is allowed to create or delete hard disk drive or partition during the setup through Custom (advanced) -> Drive options (advanced) option (note: a 100 MB system reserved partition may be created by Windows 7 Setup), or let Windows 7 install wizard backup the existing Windows files to Windows.old directory, and then delete and wipe clean the whole partition volume prior to install Windows 7.
Many people believe that Windows 7 FPP (full version) disc media or ISO is different from ISO image or disc media of Windows 7 Upgrade version. In fact, the Windows 7 Upgrade disk and Windows 7 FPP disc may be similar, if not completely the same. Only product key represents the actual version of license bought, and Windows 7 will validate against the product key, as shown by Microsoft Product Key Checker.
Not everybody has a PC readily installed with a Windows for upgrade. And more people does not have time to install an operating system especially the time-consuming Windows Vista just to install Windows 7 Upgrade version. Good news is that Windows 7 upgrade media or ISO image and product keys can be used to perform clean install or custom install on a blank and emtpy PC without any prior OS installed. With the following clean install hacks or custom install tricks, which not only save the headache of users who need to install on a new or clean computer system, but also mean everybody just need to purchase an Windows 7 upgrade license, which costs up to $100 cheaper over a Windows 7 full edition price.