How to Change Your Windows Activation Key (Win 10 & 11)

Changing your Windows product key takes under a minute. You might need to do this when replacing an expired or invalid key, upgrading from Home to Pro, or moving a retail license from an old PC. Here’s how on both Windows 10 and 11.

Key Takeaways

• Change your key in Settings → System → Activation → Change product key (Windows 11) or Settings → Update & Security → Activation → Change product key (Windows 10).
• Entering a Pro key on a Home installation automatically upgrades the edition — no reinstall needed.
• You can also change keys via Command Prompt: slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX followed by slmgr /ato.

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When to Change Your Product Key

• Replacing an invalid or blocked key — your current key was revoked or entered incorrectly.
• Upgrading editions — entering a Pro key on Home upgrades in-place.
• Transferring a license — deactivated on old PC, now entering on new PC.
• Switching from volume to retail — replacing an organizational key with a personal one.

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Method 1: Change via Settings

Windows 11

1. Open Settings → System → Activation.
2. Click Change next to “Change product key.”
3. Enter the new 25-character key.
4. Click Next → Activate.

Windows 10

1. Open Settings → Update & Security → Activation.
2. Click Change product key.
3. Enter the new key.
4. Click Next and follow prompts.

The old key is replaced immediately. If the new key is a different edition (e.g., Pro key on Home), Windows upgrades automatically.

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Method 2: Change via Command Prompt

1. Open Command Prompt as Administrator.
2. Remove the old key (optional): slmgr /upk
3. Clear old key from registry (optional, for security): slmgr /cpky
4. Install the new key: slmgr /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX
5. Activate: slmgr /ato

When to use CMD: If the Settings method gives an error, or if you need to remove the old key before entering a new one (required when transferring retail licenses).

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Changing Key to Upgrade Home → Pro

Entering a Windows Pro key on a Home installation triggers an automatic edition upgrade:

1. Open Settings → Activation.
2. Click Change product key (or “Upgrade your edition”).
3. Enter the Pro key.
4. Windows downloads Pro features and restarts (~10–20 minutes).
5. All files and apps remain — only the edition changes.

Pro keys: $59.99 (Win 10) or $99.99 (Win 11) from The Software City.

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What Happens to the Old Key?

• Retail keys: Deactivated on this device. Can be reused on another PC (one at a time).
• OEM keys: Tied to hardware. Replacing with a new key doesn’t “free up” the OEM key — it’s still linked to the motherboard.
• Digital licenses: The digital license remains linked to your hardware/Microsoft account. Entering a new key overrides it on this device.

To find your current key before replacing it, see our product key finder guide.

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Frequently Asked Questions

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