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## Solving Problems With Installations (1 of 2) * Use an Upgrade Product Key on a New Hard Drive * Sometimes you might need to use the upgrade key to install Windows when replacing a hard drive * The first free releases of Windows 10 can be activated using Windows 8.1, 8, or 7 product keys...

## Solving Problems With Installations (1 of 2) * Use an Upgrade Product Key on a New Hard Drive * Sometimes you might need to use the upgrade key to install Windows when replacing a hard drive * The first free releases of Windows 10 can be activated using Windows 8.1, 8, or 7 product keys * For Version 1607 or later, reinstall Windows 10 by logging in with your Microsoft account and activate Windows using the Activation troubleshooter in the Settings app * In a situation where a Windows 7 system was upgraded to Windows 8.0 and then updated to Windows 8.1: * Reinstall Windows 7 * Reinstall Windows 8.0 using the upgrade product key and activate Windows 8 * Download and install Windows 8.1 upgrade