![]() ![]() To install an upgrade version of Windows 7, Windows Vista or Windows XP must be installed on your computer. The product key is for an upgrade version of Windows 7 and a previous version of Windows wasn’t on your computer when Windows 7 was installed.You can’t use a product key for Windows 7 with Service Pack 1 (SP1) to activate a copy of Windows 7 without SP1. Check the product key to make sure it is for the version that you are trying to activate. You might be using a product key that doesn’t match the version of Windows 7 that’s installed on your computer.You might have mistyped your genuine product key.If you receive an error indicating that your Windows 7 product key is not valid when installing, it could be for the following reasons: In other words, if it came with Windows 7 Home Premium, you can’t install Windows 7 Professional. Start your computer using the Windows 7 installation disc or a USB flash drive, click Custom (advanced), and then click Drive options (advanced).īe sure to use the same version and edition of Windows the computer came with. ![]() You can do this to install Windows 7 upgraded version. But if you want a clean installation of Windows on a PC, you need to format the hard drive and reinstall the windows using its product key. It is recommended to install/upgrade Windows 7 while your current version of Windows running. If you bought a PC with Windows pre-installed, the original key comes pasted on the product by the PC manufacturer. If you purchase it online, the vendor will send your Windows 7 product key in the confirmation email you receive after purchasing or in the box Windows came in. ![]() This product key verifies that Windows has been used on given numbers of PCs that the Microsoft Software License Terms allow. Windows license key is a 25-character code. You get a Windows 7 product key when you purchase Windows operating system for one or more PCs. ![]()
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