windows 11 activation trouble after hardware change

Question

windows 11 activation trouble after hardware change

Chris van Zantvoort 20

I have a genuine Windows 11 Pro retail product key that was activated on this same PC. I upgraded the CPU from a Ryzen 5 2600 to a Ryzen 7 5700X, without replacing the motherboard. Windows became unactivated after the hardware change. The Activation Troubleshooter cannot find a device that can be used to reactivate it. The retail product key now returns error 0xC004C008, even though the key is not being used on another PC. My Microsoft account shows this PC twice.

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Emma1-N 15,005 Microsoft External Staff Moderator

Welcome Chris van Zantvoort,

Thank you for reaching out to Microsoft Q&A, and I'm sorry for the trouble with activation after your CPU upgrade. Windows can show error 0xC004C008 when the key is recorded as already used on another device, or on more devices than the license terms allow. To narrow this down, could you please tell us:

Where did you buy the Windows 11 Pro key (Microsoft Store, a retailer, or other)? Was Windows first installed as Home and later upgraded to Pro?
In Settings > System > Activation, which edition and which activation state is shown? For example, Windows 11 Pro and Not active, or Windows is activated with a digital license linked to your Microsoft account.
Which Microsoft account do you sign in to Windows with? Is it a personal account, and is it the same one that shows the PC twice?
Did you also update the BIOS, reset the TPM, or change any other hardware when you installed the new CPU?

In the meantime, please try these steps:

Confirm the edition. Select Start > Settings > System > Activation and check that the installed edition is Windows 11 Pro, which must match your key. If it shows Home, run the troubleshooter in step 3 and choose the upgrade option if it is offered.
Check your Microsoft account. Sign in to your Microsoft account, open Devices, and note both entries for this PC (name and last activity). Do not delete anything yet.
Restart the PC, then sign in as an administrator. Go to Settings > System > Activation > Troubleshoot, select I changed hardware on this device recently, and sign in with the same Microsoft account. Tick This is the device I'm using right now, then select Activate. If two entries appear, try each one. If your device is not listed, check that you signed in with the account that was linked to the license.
Try phone activation. Type SLUI 04 in the taskbar search, press Enter, choose your country or region, and follow the prompts.

Looking forward to your update.

Chris van Zantvoort 20 Reputation points

2026-10-23T10:11:23.29+00:00

Hello Emma,

Thank you for your help and for providing the troubleshooting steps.

I wanted to update you on the outcome and the current state of my Windows activation.

The issue is now resolved: Windows 11 Pro is activated.

Here is what happened:

My Windows 11 Pro installation was showing as not activated, with error 0xC004C008.

Shortly beforehand, I upgraded my CPU from an AMD Ryzen 5 2600 to an AMD Ryzen 7 5700X and updated my BIOS. I kept the same motherboard and otherwise continued using the same PC.

My Microsoft account showed four device entries named DESKTOP-MVF08N2. One showed the old Ryzen 5 2600, two appeared to have identical details, and the fourth showed my current Ryzen 7 5700X.

I tried Settings → System → Activation → Troubleshoot → I changed hardware on this device recently, but the reactivation window said, “We can’t reactivate Windows from these devices.”

Running slui 4 redirected me to the Activation settings page instead of opening the phone activation wizard.

I then ran slmgr /dti from an elevated Command Prompt to obtain the Installation ID.

I used Microsoft's Product Activation portal, selected Windows 11, and entered the Installation ID. Interestingly, the next page displayed Windows 10 branding and asked how many computers I had installed the software on. Since this is the same physical PC and I have only used this copy on that one computer, I entered 1. The activation process then worked, and Windows is now activated.

Current status:

Edition: Windows 11 Pro

Activation state: Active — “Windows is activated.”

I am signed in to Windows with my Microsoft account, using an administrator account.

The Activation settings page does not say “Windows is activated with a digital licence linked to your Microsoft account.”

There is no “Add an account” option on that page.

All four device entries are still present in my Microsoft account; I have not removed any of them.

Could you please confirm whether the activation is now in good standing and whether the licence is linked to my Microsoft account?

Thank you for your assistance.
Emma1-N 15,005 Reputation points Microsoft External Staff Moderator

2026-10-24T08:06:12.27+00:00
Hello Chris van Zantvoort,

Thank you for the update, and I'm glad Windows 11 Pro is now activated.

Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas.

At the moment it says Windows is activated, which usually means the license is not yet linked to your Microsoft account. The linked status reads Windows is activated with a digital license linked to your Microsoft account.

If you'd like to try linking it, please do the following:

Go to Start > Settings > Accounts > Your info and confirm you are signed in with your Microsoft account (an email address is shown).

Restart the PC, then check Settings > System > Activation again.

You don't need to remove the four device entries from your Microsoft account for activation to work. Please keep your product key private and don't post it on this public thread.
Chris van Zantvoort 20 Reputation points

2026-10-24T10:02:27.4933333+00:00

Hello again, Emma

I restarted my PC and checked Settings → System → Activation again. Windows 11 Pro is showing as active, but the activation status only says “Windows is activated”, rather than “Windows is activated with a digital license linked to your Microsoft account.”

The PC is signed in with my Microsoft account. Under Settings → Accounts → Your info, my email address is displayed and my account is listed as an administrator. However, the Activation page does not show an “Add an account” option, so I am unsure how to link the digital licence to my Microsoft account.

I would like to make sure my existing licence is correctly linked to my Microsoft account so that future hardware changes will be easier to handle.

I have also noticed that Settings → Accounts displays my real name above my email address, while Settings → Accounts → Your info displays my nickname above the same email address. My Microsoft account profile on the website shows my real name. I have not manually changed either name recently. Unsure if this is related.

Sincerely, Chris
Emma1-N 15,005 Reputation points Microsoft External Staff Moderator

2026-10-27T04:24:34.2733333+00:00
Hello Chris van Zantvoort,

Since you are already signed in with your personal Microsoft account as an administrator but that option is missing, I recommend contacting Microsoft Support so they can assist further with the activation/account-linking issue:

Visit the Microsoft Support contact page: Contact - Microsoft Support

In the search bar provided on the page, type "Hardware change" and press Enter.

Click on Ask Our Support Assistant

When the chat box appears, type " I want to talk to Live chat agent"

After that, click Contact support

When prompted to select your product or service, choose "Other Products".

For the category, choose "Windows".

Look for and click on "Chat with a support agent in your web browser".

Explain your situation clearly: Be concise but provide all the relevant details.

Disclaimer: Please note that this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas.