
If you want to upgrade your Windows 8 to Windows 10, the Windows product key is also essential. After booting from the Windows installation DVD or USB disk, the Windows product key also need to be inputted correctly before doing the actually reset or reinstallation. When you want to download the Windows 8 ISO from Microsoft website, the Windows product key is required. If you want to reset, reinstall or upgrade your Windows 8/8.1, the Windows product key is required.įor example, your Windows 8 has random booting problems and in an unstable state, your IT friend recommends you to reset/reinstall your Windows 8 to solve the problem.



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