If you have a valid Windows 7, 8.1, or 10 product key, you can often still use it to activate Windows 11. During installation, simply select "I don't have a product key," and once the OS is installed, enter your old key in . 2. Using the Activation Troubleshooter
If you have a genuine copy of Windows 10, you can upgrade to Windows 11 for free. Your existing digital license will automatically transfer to the new version. Use Older Product Keys: windows 11 digital license activator download free
If you're looking to activate Windows 11 officially: If you have a valid Windows 7, 8