No, you cannot use a W7 key for a W10 device. Each key is designed specifically for its corresponding device model.
No, you cannot use a W7 key for a W10 device. Each key is designed specifically for its corresponding device model.
Consider switching to Windows 10 for better compatibility with your Xbox games and Fortnite. Your Windows 7 key might still work if you activate it through the Xbox app. Regarding the installer, using a Windows 10 USB will likely upgrade your OS rather than just reinstalling it.
A few months back, Windows 7 keys functioned properly for me. I decided to give it another shot if you boot into Windows 7, insert your Windows 10 USB, and launch setup.exe—it will handle the upgrade and transfer your apps and data (if you choose that option). When installing from the USB directly into the installer, it creates a brand new system. Files on the C partition will be copied to a windows.old folder. Generally, this process succeeds, but I always suggest backing up your system image first. I use Acronis True Image for that, though it’s a paid tool. It offers a 30-day free trial.
Both options are possible, but only a bootable setup is suitable for a new installation. OP, the transition from Win7Ult to Win10 Pro went well. Good luck!