Windows 10 – Activating and Linking Your Microsoft Account

Before Activating Windows

Confirm that Windows was installed from a trusted source and that the product key matches the installed edition.

If Windows was modified by an unofficial activation tool, reinstall Windows using official Microsoft installation media before entering a genuine product key.

Check the Installed Edition

1. Press Windows + R.
2. Enter winver.
3. Select OK.
4. Record the displayed Windows edition.

You can also open Settings > System > About and check the edition under Windows specifications.

The product key must match the installed edition:

• Windows 10 Home requires a Home license.
• Windows 10 Pro requires a Pro license.
• Enterprise and Education require their corresponding licenses.

Check the Activation Status

1. Open Settings.
2. Select Update & Security.
3. Select Activation.
4. Record the installed edition and activation message.

Common Windows activation messages

Activation Message	Meaning
Windows is activated	The current installation has an active license.
Windows is activated with a digital license	The activation service recognizes an eligible license for the device.
Windows is activated with a digital license linked to your Microsoft account	The digital license is connected to the signed-in Microsoft account for supported reactivation scenarios.
Windows is not activated	A valid license has not been confirmed for the current installation.

Understand the License Type

Windows license and activation types

Type	Typical Association	Hardware Change
OEM license	Generally associated with the first computer on which it is activated.	A motherboard replacement may prevent automatic reactivation.
Retail license	Licensed according to the applicable retail terms.	May have different transfer or reactivation rights under its terms.
Digital license	An activation method that recognizes eligible device hardware.	Can use account-linked troubleshooting where eligible, but rights depend on the underlying license.
Volume license	Managed by an organization.	Controlled by the organization’s agreement and activation infrastructure.

Activate Windows with a Product Key

Open Activation Settings

1. Open the Windows search box.
2. Enter Activation.
3. Select Activation settings.

You can also open Start > Settings > Update & Security > Activation.

Select Change Product Key

On the Activation page, select Change product key.

Enter the Product Key

1. Enter the genuine 25-character product key.
2. Check every character carefully.
3. Select Next.
4. Allow Windows to verify the key.
5. Select Activate when requested.

A Windows product key follows this format:

XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Do not use a genuine key in public screenshots. The image above contains no usable product key.

Complete an Edition Upgrade

If the entered key is for a supported higher edition, such as Windows 10 Pro on an activated Windows 10 Home installation, Windows may display an edition-upgrade prompt.

1. Confirm that the target edition matches the purchased key.
2. Close running applications.
3. Connect laptops to power.
4. Select Start to begin the edition upgrade.
5. Allow the computer to restart.
6. Return to Activation settings afterward.

Check both the edition and activation status. An edition change can complete even when activation still requires troubleshooting.

Link the Digital License to a Microsoft Account

Linking an eligible digital license to a Microsoft account can help Windows identify the device during the Activation troubleshooter.

Add a Microsoft Account

If the Activation page displays an option to add a Microsoft account:

1. Confirm that Windows is already activated.
2. Select Add an account.
3. Use the Microsoft account that you want associated with the device.

If the Activation page does not display Add an account, open Settings > Accounts > Your info and review the available Microsoft account sign-in options.

Sign In Securely

1. Enter the Microsoft account email address, phone number, or Skype name.
2. Select Next.
3. Enter the account password.
4. Complete any multi-factor authentication request.

Do not enter your Microsoft account credentials into a window opened by an unknown website or support application.

Confirm Your Identity

Windows may request the current local Windows account password before completing the account change.

1. Enter the existing Windows password when prompted.
2. Select Next.
3. Create or confirm a Windows Hello PIN if required.

The exact sign-in flow varies according to whether the computer uses a local account, Microsoft account, work account, or organization-managed configuration.

Verify That the License Is Linked

1. Return to Settings > Update & Security > Activation.
2. Check the activation message.
3. Look for confirmation that Windows is activated with a digital license linked to the Microsoft account.

These screenshots show an older Windows 10 interface. Button names and page layouts may differ slightly in newer builds.

Reactivate Windows After a Hardware Change

A significant hardware change, especially replacing the motherboard, may cause Windows to treat the computer as a different device.

1. Install the same Windows edition previously activated.
2. Connect the computer to the internet.
3. Sign in with the Microsoft account connected to the digital license, if applicable.
4. Open Settings > Update & Security > Activation.
5. Select Troubleshoot.
6. Select I changed hardware on this device recently, if displayed.
7. Sign in to the Microsoft account if requested.
8. Select the applicable device.
9. Select the option confirming that this is the device currently being used.
10. Complete the activation process.

If the device does not appear or activation is rejected, review the underlying license terms. Linking an account does not make an OEM license freely transferable.

Check Activation from Command Prompt

You can use Windows licensing commands to check the current state.

Useful Windows activation commands

Command	Purpose
slmgr.vbs /dli	Displays basic license and activation information.
slmgr.vbs /dlv	Displays detailed licensing information for troubleshooting.
slmgr.vbs /xpr	Displays whether the current activation has an expiration date.
slmgr.vbs /ipk PRODUCT-KEY	Installs a genuine product key.
slmgr.vbs /ato	Requests online activation using the installed key.

When installing a key from an elevated Command Prompt, replace the placeholder:

slmgr.vbs /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

Then request activation:

slmgr.vbs /ato

Fix Common Activation Problems

Common Windows activation problems

Problem	What to Check	Next Action
Edition mismatch	Compare the installed edition with the product key.	Install or switch to the matching Windows edition.
Invalid product key	Check all 25 characters and the Windows product.	Enter the correct key and record the complete error if rejected.
Blocked product key	Check the key source and purchase information.	Contact the seller or Microsoft through an official channel.
No internet connection	Check internet access, proxy, VPN, date, time, and time zone.	Correct the connection or time settings and retry activation.
License not linked	Review the message on the Activation page.	Sign in with the intended Microsoft account and verify the status again.
Hardware-change failure	Check the license type, edition, Microsoft account, and device list.	Run the troubleshooter or contact Microsoft activation support.

Run the Activation Troubleshooter

1. Open the Activation page.
2. Select Troubleshoot, if available.
3. Follow the displayed instructions.
4. Record the complete activation error code.

Do not repeatedly enter unrelated keys or install unofficial activation tools. This can make the licensing state more difficult to diagnose and may expose the computer to malware.

Protect Your Microsoft Account and Product Key

• Use a unique Microsoft account password.
• Enable multi-factor authentication.
• Keep recovery email and phone information current.
• Review devices connected to the account.
• Remove devices you no longer own where appropriate.
• Do not publish the complete Windows product key.
• Store the key and invoice in a secure location.
• Sign in only through Windows or official Microsoft pages.
• Do not provide remote access to unknown activation support services.

Frequently Asked Questions

Conclusion

To activate Windows, first confirm that the installed edition matches the genuine product key. Open Activation settings, select Change product key, enter the 25-character key, and verify the resulting activation message.

After activation, linking an eligible digital license to a Microsoft account can help with supported reactivation scenarios. It does not convert the license type or guarantee transfer to another computer.

Keep the product key private, protect the Microsoft account with multi-factor authentication, and use the Activation troubleshooter after an eligible hardware change.