These steps will only work if you’ve upgraded your computer to Windows 10 in the past 10 days. If it’s been longer than that, the only way to downgrade is to reset your PC to its original factory settings. See this method to learn how. If your computer came with Windows 10 pre-installed, there’s no way to downgrade. Any apps you’ve installed since upgrading will be removed, but your personal files will remain intact.
If it’s been more than 10 days since you’ve upgraded, the button will be grayed out. You’ll also see a message that says “This option is no longer available because your PC was upgraded more than 10 days ago. "
If you were not signed into the previous version of Windows with the same Microsoft account you use to sign into Windows 10, you’ll be prompted to log in with your old password after downgrading.
If you upgraded to Windows 10 more than 10 days ago, the only way to return to the original operating system (Windows 8, 8. 1, or 7) is to reset your PC to its original factory settings.
