Activating Windows 10 without a product key can be done through several methods, but it is important to note that the legitimate and permanent activation requires a valid product key or a digital license. Here are some common ways to activate Windows 10 without entering a traditional product key:

1. Using a Digital License (Digital Entitlement)

• If you upgraded to Windows 10 for free from a genuine Windows 7 or 8.1, or if your device came pre-installed with Windows 10, you likely have a digital license.
• Windows 10 will activate automatically once connected to the internet and logged into the associated Microsoft account.
• You can reinstall Windows 10 on the same device without a product key; activation will be automatic after installation if the digital license is linked to your Microsoft account

2. Skipping Product Key During Installation

• During Windows 10 setup, select "I don't have a product key" when prompted.
• Complete the installation and then sign in with your Microsoft account linked to a digital license.
• Windows will activate automatically if a digital license is detected for your hardware

3. Using Generic Volume License Keys (GVLK)

• Microsoft provides generic keys for installation purposes (not for permanent activation).
• These keys allow installation and temporary activation but do not activate Windows permanently.
• Some guides suggest using these keys with command prompt commands to activate Windows, but this often requires additional steps or tools and may not result in genuine activation

4. Activation via Command Prompt (for Advanced Users)

• You can use command prompt to install a product key and activate Windows:

  • Open Command Prompt as Administrator.

  • Use commands like:

    slmgr.vbs /ipk <product-key>
    slmgr /ato
    

  • This requires a valid product key; some users try publicly available keys, but these may not be legitimate or permanent

Important Notes

• Tools like KMSpico or other activators exist that claim to activate Windows without a key, but these are unofficial, potentially illegal, and pose security risks

• Microsoft recommends purchasing a genuine license for permanent activation.
• Using Windows without activation limits personalization options and displays a watermark.

In summary, the only fully legitimate way to activate Windows 10 without entering a product key manually is if your device has a digital license linked to your Microsoft account, which allows automatic activation after installation or hardware changes. Otherwise, a valid product key or purchase is required for permanent activation

. If you want to avoid entering a product key during installation, select "I don't have a product key" and sign in with your Microsoft account linked to a digital license, and Windows will activate automatically if eligible