Hi, I'm John! I will help you with this.

Can you tell me a little more about the issue?

  1. Did this PC come with Windows 11 Pro before, or was Windows 11 Pro installed manually?
  2. Also, have you already tried the Activation Troubleshooter?
  3. Go to Settings > System > Activation, then click "Troubleshoot." What exact message or error code are you seeing there?

Click "Add comment" to let me know.

Answer from John Jefferson Doyon on learn.microsoft.com
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GitHub
gist.github.com › ThiagoBarradas › e21d09bdc896892299af0b21e43f1069
Windows Product Keys · GitHub
3 days ago - ✅ No manual key input ✅ No KMS (no 6-month expiration) ✅ Works on Home, Pro, and Enterprise versions · After the script finishes, just restart your PC. The watermark will be gone, and you'll see "Windows is activated with a digital license" in your settings. ... Also works on Windows 11 (all editions) — same command.
🌐
Microsoft Support
support.microsoft.com › en-us › windows › activation › activate-windows
Activate Windows | Microsoft Support
After your Microsoft account has been added, on the Activation page you’ll see Windows is activated with a digital license linked to your Microsoft account. Depending on how you got your copy of Windows 11, you'll need either a digital license or a 25-character product key to activate it.
Discussions

How to get the activation for Windows 11 pro?
Under Windows, check whether Windows is activated. ... Buy a new device that includes Windows 11 Pro (product key is provided with the device or embedded). More on learn.microsoft.com
🌐 learn.microsoft.com
2
9
May 12, 2026
Where Can I Buy a Legitimate Windows 11 Pro Activation Key?
I've been through the ringer with the grey market key sites. Had lots of issues with the keys working but then they'd get deactivated all of a sudden. So I went down a bit of a rabbit hole. From what I learned, you want to make sure the key you get is Retail and not OEM. These OEM keys are so cheap but they actually aren't supposed to be sold. They are for the manufacturer to put on their computers. You can still get a Retail key pretty cheap though. I use DigitalChillMart now, they're the only site pretty much that will sell you a Retail key for a reasonable price. More on reddit.com
🌐 r/buildmeapc
842
650
November 13, 2025
Activate My Windows 11 Professional - have a Key
If it still doesn't work get ShowKeyPlus from the Store and enter the key at Check edition in the app. Does it verify a Windows 10/11 Pro licence. Assuming the key is not VK7JG-NPHTM-C97JM-9MPGT-3V66T this is a generic key and cannot be used to activate windows. More on learn.microsoft.com
🌐 learn.microsoft.com
14
21
How to activate windows 11 pro
Ensure you have a valid product key: Make sure that the product key you purchased is for Windows 11 Pro. Open Activation Settings: Go to Settings > Update & Security > Activation. More on learn.microsoft.com
🌐 learn.microsoft.com
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40
People also ask

Do free Windows 10/11 keys activate Windows permanently?
No. Generic keys let you install Windows and select your edition, but they don't provide permanent activation. To fully activate, you need a genuine retail key, OEM license, or volume license. The keys listed are installation keys only, published by Microsoft for IT and testing purposes.
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hypestkey.com
hypestkey.com › home › blog › free windows 10 keys & free windows 11 keys (2026)
Free Windows Keys: Windows 10 & 11 Product Keys (2026)
How do I get a free Windows key that actually activates?
Free activation only exists in specific situations. Students can often get licenses through their school's IT department or Azure Dev Tools for Education. Some employers provide licenses for work-from-home setups. If your PC came with Windows preinstalled, the OEM license activates automatically when you reinstall. Beyond these cases, you have to buy a key.
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hypestkey.com
hypestkey.com › home › blog › free windows 10 keys & free windows 11 keys (2026)
Free Windows Keys: Windows 10 & 11 Product Keys (2026)
Is using free Windows keys legal?
Installing Windows with generic keys is legal. Microsoft publishes these keys publicly for IT professionals, system builders, and testing. Running Windows without activation long-term is a gray area that technically violates the license agreement, but Microsoft lets the system keep functioning.
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hypestkey.com
hypestkey.com › home › blog › free windows 10 keys & free windows 11 keys (2026)
Free Windows Keys: Windows 10 & 11 Product Keys (2026)
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Microsoft Support
support.microsoft.com › en-us › windows › activation › find-your-windows-product-key
Find your Windows product key | Microsoft Support
A Windows product key is a 25-character code used to activate Windows. It looks like this: ... Depending on how you got your copy of Windows 10 or Windows 11, you'll need either a 25-character product key or a digital license to activate it. A digital license is a method of activation in Windows 10 and Windows 11 that doesn't require you to enter a product key.
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HypestKey Software
hypestkey.com › home › blog › free windows 10 keys & free windows 11 keys (2026)
Free Windows Keys: Windows 10 & 11 Product Keys (2026)
September 4, 2026 - Looking for free Windows 10 keys or free Windows 11 keys? This page has every generic product key from Microsoft’s official documentation. Use them to install Windows, pick your edition, and buy a license later when you’re ready. Last updated: September 2026 — keys verified against Microsoft’s official documentation. ... Let’s clear something up before you scroll to the tables. The keys on this page are installation keys, not permanent activation keys.
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SftKey
sftkey.com › home › shop › windows 11 pro key – purchase retail license, $28.99 - sftkey
Windows 11 Pro Key – Purchase Retail License, $28.99 - SftKey
Windows 11 Pro Key - Retail License - Windows 11 ( 100% Genuine License - Retail Version - Pro Edition). Compatible with Windows 11 Pro on x64 and Arm64 devices. Multilingual Support. Global Region activation Instant Delivery Online Activation
(4.9)
Price: $28.99
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Medhacloud
medhacloud.com › home › blog › managed it support › windows 10 & 11 product keys — all editions, generic & kms (2026)
Windows 10 & 11 Product Keys — All Editions, Generic & KMS (2026)
March 16, 2026 - They allow installation but do not provide permanent activation. Generic (RTM) keys let you install Windows and select a specific edition during setup — they work on any PC. KMS client keys are for corporate environments where a KMS host server manages activation across the network. KMS keys will NOT work on a standalone home computer without a KMS server. Yes. Windows 10 and 11 work fully without activation — you get all updates, security patches, and can install any application.
Find elsewhere
Top answer
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Hi, I'm John! I will help you with this.

Can you tell me a little more about the issue?

  1. Did this PC come with Windows 11 Pro before, or was Windows 11 Pro installed manually?
  2. Also, have you already tried the Activation Troubleshooter?
  3. Go to Settings > System > Activation, then click "Troubleshoot." What exact message or error code are you seeing there?

Click "Add comment" to let me know.

2 of 2
4

To activate Windows 11 Pro on a PC where it is already installed, a valid license is required, either as a digital license or a product key.

  1. Check current activation status:
    • Select Start > Settings > System > Activation.
    • Under Windows, check whether Windows is activated.
  2. If there is no license yet (not activated):
    • A Windows 11 Pro license can be obtained in one of these ways:
      • Buy a new device that includes Windows 11 Pro (product key is provided with the device or embedded).
      • Buy Windows 11 Pro (full license or upgrade) from the Microsoft Store app (digital license linked to a Microsoft account).
      • Buy a box copy or digital copy of Windows 11 Pro from an authorized retailer (product key is in the box or confirmation email).
    • If there is no key or license yet and Windows 11 Pro is already installed:
      1. Go to Start > Settings > System > Activation.
      2. Select Go to Store (or Open Store) to open the Microsoft Store app.
      3. Purchase a Windows 11 Pro digital license. Once the purchase completes and the PC is online and signed in with the same Microsoft account, activation should occur automatically.
  3. If there is a product key for Windows 11 Pro:
    • Select Start > Settings > System > Activation.
    • Choose Change product key.
    • Enter the 25-character Windows 11 Pro product key from the device packaging, Certificate of Authenticity, card, or confirmation email.
    • Complete activation while connected to the internet.
  4. If online activation fails:
    • Use the activation troubleshooter from Settings > System > Activation as described in Activate Windows.
    • If still not successful, activation can be done by phone using the Activate by Phone option in Settings > System > Activation, or via the Product Activation Portal using the information shown on that screen.

References:

  • Activate Windows
  • Product activation for Windows - online & Microsoft Support Product Activation Portal
🌐
G2A
g2a.com › software › operating system › windows 11 › microsoft windows 11 pro › microsoft windows 11 pro (pc) - microsoft key - global
Microsoft Windows 11 Pro (PC) - Microsoft Key - GLOBAL - Cheap - G2A.COM!
Microsoft Windows 11 Pro (PC) - Microsoft Key - GLOBAL - Warning! This product cannot be used to upgrade your system from other version!  Design your operating system the way you wish. See the new and improved tools and features of Windows 11 Pro for business and home cl ...
(5.0)
Price: $22.28
🌐
GitHub
gist.github.com › NguyenHoangKaiser › 301ecddf0f6b623de104146984b03d89
Activate Windows 11 Pro free · GitHub
December 23, 2025 - People which already have Pro, but not activated, can skip to this step. What you first need to do is open CMD (Command Prompt) as Administrator using this keyboard key: ... Now we are gonna check of your edition is supported to upgrade to Pro, run the following command to check this: DISM /online /Get-TargetEditions If you see "Professional" in the list, then you can upgrade your Windows edition to Pro for free!
🌐
Office Digital
officedigital.io › home › blog › free windows 10 & 11 product keys (2026 updated list)
Free Windows 10 & 11 Product Keys (2026 Updated List) – Office Digital
1 month ago - These activation keys are general-purpose keys provided by Microsoft for testing, evaluation, and non-commercial use only. It does not grant a full license and cannot be used for permanent activation. If you use Windows 10 or Windows 11 for commercial or long-term personal use, you must purchase a genuine key from Microsoft or an authorized distributor.
🌐
Reddit
reddit.com › r/buildmeapc › where can i buy a legitimate windows 11 pro activation key?
r/buildmeapc on Reddit: Where Can I Buy a Legitimate Windows 11 Pro Activation Key?
November 13, 2025 -

UPDATE: I ended up getting my Windows 11 Pro key from vendafly.com. Super fast email delivery, worked instantly, no issues at all. Highly recommend if you want something safe & reliable.

Hey everyone, I recently bought a new PC from a local store, but they didn't provide a Windows 11 Pro activation key. Windows 11 Pro is already installed, but it's asking for activation, and I want to activate it properly.

I'm looking for a legitimate source to buy a Windows 11 Pro key—no sketchy tools or unauthorized sites like Massgrave (as some subreddits suggest). I'd prefer an affordable yet official option (maybe OEM or retail, as long as it's legal and safe).

Can anyone recommend trustworthy websites or platforms to buy a working

Windows 11 Pro license? Maybe places you've personally used or that are known in the tech community?

Thanks in advance for the help!

Top answer
1 of 5
6

When you install windows you can enter the product key and the correct edition (Pro) should be installed based on the product key you enter.

If you have Pro edition installed now then the other user detailed post covers using the product key.

If it still doesn't work get ShowKeyPlus from the Store and enter the key at Check edition in the app. Does it verify a Windows 10/11 Pro licence.

Assuming the key is not VK7JG-NPHTM-C97JM-9MPGT-3V66T this is a generic key and cannot be used to activate windows.

2 of 5
4

Hi there, julian! Marc here.

Thanks for reaching out! If you already have a valid product key for Windows 11 Professional, activating it is straightforward. Here’s how you can do it:

> Open Settings: Press Windows key + I to open the Settings app.

> Go to Activation Settings Click on System > Activation Select “Change product key”

> Under Activation State, click “Change” next to Change product key

> Enter your 25-character Windows 11 Pro key. It looks like this: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

> Click Next, then Activate

> If you've entered the key and it's not working, make sure: You're connected to the internet. also the key is for Windows 11 Professional, not another edition (like Home or Enterprise)

> You can also run the Windows Activation Troubleshooter: Go to Settings > System > Activation. If you see Troubleshoot, click it and follow the prompts

If you still run into issues, feel free to reply with the error code or message you're seeing. I’ll be happy to help further!

Best regards,

🌐
Microsoft Learn
learn.microsoft.com › en-us › windows-server › get-started › kms-client-activation-keys
Key Management Services (KMS) client activation and product keys | Microsoft Learn
When you activate Windows or Windows Server with a KMS host, the keys provided here are intended for volume licensing scenarios and can't be used with retail editions. KMS client keys won't activate or serve as a retail license key. If you installed a retail copy of Windows, you must use another activation method, like a MAK or by purchasing a genuine retail license.
🌐
Reddit
reddit.com › r/softwarehelpdesk › windows activation keys (windows 11 pro or home)
r/softwarehelpdesk on Reddit: Windows activation keys (Windows 11 Pro or Home)
August 1, 2025 -

I just built a new PC and want a Windows 11 key to remove the watermark and turn on features like dark mode. I am choosing between Windows 11 Pro and Windows 11 Home and I would like a safe, legitimate activation key at a reasonable price. Where can I buy a cheap Windows 11 product key that is still reliable?

Are OEM keys fine for a personal build, or should I look for a retail or ESD key so it can be transferred later? I almost bought from a marketplace like g2a but got cold feet. Also, can a product key itself carry malware, or is the real risk from shady installers and downloads?

Please share recent experiences with trusted sources, whether Microsoft deals, Amazon, verified resellers, student discounts, or other legitimate stores. Tips on how to check a seller’s company info, Invoice, or Microsoft Partner status would help a lot. Thanks.

🌐
Reddit
reddit.com › r/windowshelp › activating windows 11 pro with product key while on windows 11 home
r/WindowsHelp on Reddit: Activating windows 11 pro with product key while on windows 11 home
August 4, 2025 -

I’m currently running windows 11 home unactivated on my pc I just built a few days ago. I’ve just purchased a product activation key for windows 11 pro. When I tried to activate it, it said it didn’t work and gave me the error code 0xc004f050. When I looked up the code online it seemed like it could have to do with either not having a legitimate product key or having the wrong version of windows currently running. I’m leaning towards the latter. Do I need to get an unactivated version of windows 11 pro first before I can activate it? If so, how do I do that?

🌐
GitHub
github.com › elfordanson › windows_11_pro_product_key_activation
GitHub - elfordanson/windows_11_pro_product_key_activation: Activate Windows 11 Pro for free using CMD — no third-party tools required · GitHub
Activate Windows 11 Pro using CMD — no third-party tools required. Open Command Prompt as Administrator by following these steps: Press Windows key + R to open the Run dialog.
🌐
GitHub
gist.github.com › aravindnc › 170a569ac305912dd43252f64307902e
Activate Windows 8, 8.1, 10 and 11 Pro for Free · GitHub
A guide how to get and activate Windows 8, 8.1, 10 and 11 Pro for free! If you see the Windows keyboard button in this guide; and you can't find it on your keyboard, you likely have/had Windows 10 which has the button . If you can't find that one, you likely have a PC that has been upgraded to Windows 8/8.1/10/11 from Windows 8.1/8/7/Vista/XP and other ones.
🌐
GitHub
gist.github.com › Tushar6T9 › 1dc4e86fdb2a669b6692b08608741314
Windows 11 Pro Product Key Activation · GitHub
Activate Windows 11 Pro using CMD — no third-party tools required. Open Command Prompt as Administrator by following these steps: Press Windows key + R to open the Run dialog.
🌐
Microsoft Support
support.microsoft.com › en-us › windows › deployment › install-upgrade › upgrade-windows-home-to-windows-pro
Upgrade Windows Home to Windows Pro | Microsoft Support
... If the User Account Control window appears, enter a user name and password of an account that has administrator privileges on the Windows device, and then select the Yes button. In the Change Product Key window that opens, enter the 25-character Windows 11 Pro product key.