For help finding your product key, see Find your Windows product key. For troubleshooting and other info about updating Windows 11, see Windows Update: FAQ or Troubleshoot problems updating Windows. For info on upgrading to Windows 11, see Upgrade to Windows: FAQ.
Confirm that your device is up to date and running Windows 11. In the search box on the taskbar, type winver, and then select Winver from the list of results. You'll see the version and build of Windows.
Not running Windows 11? Learn how to update your device at update Windows.
Make sure the error hasn't changed. Sometimes when you run the Activation troubleshooter or try to activate, the error code and message will change. If the error code has changed, look up the new code below and follow the recommended steps. (If you're getting an error code that isn't listed on this page, contact customer support.)
If you're running Windows 11, the Activation troubleshooter might help reactivate Windows if you recently made a significant hardware change (such as replacing the motherboard) or reinstalled Windows.
The product key used on this device didn't work with this edition of Windows. You might need to get in touch with the store or company you bought Windows from, enter a different product key, or go to the Store to buy genuine Windows.
If you think you installed the wrong edition, select Start > Settings > System > Activation , and then select Troubleshoot. If the troubleshooter detects a valid Windows 11 digital license for an edition not currently installed, it will let you know and show you how to install the correct edition.
Open Activation settings
In this situation, activation is typically managed by your organization, and you'll need to contact your system administrator for assistance. For more info, see Troubleshooting Windows license expiration issues.
You must use a valid product key to activate Windows. Your product key should be in the confirmation email you received after buying Windows, included with the packaging that came with your device, or on the Certificate of Authenticity (COA) attached to the back or bottom of your device.
If you've made a major change to your device's hardware, such as a motherboard replacement, run the Windows Activation troubleshooter located on the activation settings page. Note that you might be asked to go through the reactivation process. For more info, see Using the Activation troubleshooter.
You upgraded to Windows 11, but the activation servers were busy. If you upgraded from an activated copy of Windows 7 or Windows 8.1, your copy of Windows 11 will be automatically activated, or you can wait a while and then select Activate. If you continue to have problems with activation, contact customer support.
You upgraded to Windows 11 using the free upgrade offer, but Windows 11 isn't activated after a reinstall. Your copy of Windows 11 should automatically be activated as long as you didn't make any significant hardware changes to your device (such as replacing the motherboard). If you continue to have problems with activation, contact customer support.
If you bought a device from a reseller of Windows 11 and expected the key to be valid, contact the reseller. If your device was purchased with Windows 11 preinstalled and you received this activation error upon turning it on for the first time, contact your device manufacturer.
You might see this error if you entered a product key for a different edition of Windows than the edition installed on your device. You might also see this error if you previously upgraded to Windows 11, but the current edition of Windows installed on your device doesn't match the edition of your digital license.
If your device is running Windows 11 (Version 1607 or later), the Activation troubleshooter can help you install the correct edition of Windows on your device. For more info, see Using the Activation troubleshooter.
You might see this error if you entered a product key for a different version or edition of Windows. For example, a product key for the Enterprise edition of Windows 11can't be used to activate Windows 11 Home or Windows 11 Core editions.
Make sure that you're connected to the internet and your firewall isn't blocking Windows from activating. If you're still having problems, try to activate Windows by phone. In the search box on the taskbar, type SLUI 04, select SLUI 04 from the list of results, and then follow the instructions on the screen to activate Windows.
You might see this error if the product key has already been used on another device, or it's being used on more devices than the Microsoft Software License Terms allow. To fix the problem, buy a product key for each one of your devices to activate Windows on them.
If you made a substantial hardware changes to your device (such as replacing the motherboard) and you have a valid product key, try to activate Windows by phone. In the search box on the taskbar, type SLUI 04, select SLUI 04 from the list of results, and then follow the instructions on the screen to activate Windows. For more info about reactivating Windows 11 (Version 1607 or later) after a hardware change, see Reactivating Windows after a hardware change.
You might see this error if you entered a product key for the Enterprise edition of Windows to activate Windows 11 Home or Windows 11 Pro. Enter a product key that matches the edition of Windows on your device.
This error occurs when a Volume License (a license that was bought from Microsoft by an organization to install Windows on multiple devices) was used on more devices than the Microsoft Software License Terms allow. To fix the problem, you might need to use a different product key to activate Windows on your device. Contact your organization's support person for more info.
You might see this error if you entered a product key for the Enterprise edition of Windows to activate Windows 11 Home or Windows 11 Pro. Try entering a product key that matches the edition of Windows on your device.
Or, you might see this error if you're trying to activate your work device but aren't connected to your workplace's network. If you're connected to your work network and still see this error, you might need to change the network settings. Contact your organization's support person for more info.
You might see this error after installing third-party software that changed system files. Windows activation needs certain system files to complete activation. You can try to restore the system files back to an earlier point in time. This removes any software you installed after that point in time without affecting your personal files.
An error occurred with our activation server or licensing service. Please wait a few minutes and then try the following Windows 11 Pro License Recovery steps: Select Start > Settings > System > Activation , and then select Troubleshoot to run the Activation troubleshooter.
Open Activation settings
When the troubleshooter is complete, select Go to Microsoft Store to launch the Microsoft Store app. If the Microsoft Store app shows there was a problem, select Try again. After a few minutes, you should see a message that thanking you for activating genuine Windows, followed by another message showing that Windows was activated.
Go to Windows Help, enter the error code in the Search for Help box at the top-right, and run the search. Browse through the search results carefully to make sure you try only those that apply to your situation.
For help finding your product key, see Find your Windows product key. For troubleshooting and other info about updating Windows 10, see Windows Update: FAQ or Troubleshoot problems updating Windows. For info on upgrading to Windows 10, see Upgrade to Windows: FAQ.
Confirm that your device is up to date and running Windows 10, version 1607 or later. In the search box on the taskbar, type winver, and then select Winver from the list of results. You'll see the version and build of Windows.
Not running Windows 10, version 1607 or later? Learn how to update your device at update Windows 10.
If you're running Windows 10, version 1607 or later, the Activation troubleshooter might help reactivate Windows if you recently made a significant hardware change (such as replacing the motherboard) or reinstalled Windows.
If you think you installed the wrong edition, select Start > Settings > Update & Security > Activation , and then select Troubleshoot. If the troubleshooter detects a valid Windows 10 digital license for an edition not currently installed, it will let you know and show you how to install the correct edition.
Open Activation settings