MS Win 8.1 PRO OEM Key
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26.81CAD
96.20CAD
1-500
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Oct.01 ~ Oct.31
Only 20.11CAD
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-84%Please install the correct win system yourself before activate the key
How long will it take to receive the key after purchase? Where can I find it?
The key will be delivered automatically within 3-5 minutes. You can find it in "My Purchased Orders".
What should I do if my key fails to activate?
There are various reasons for activation failure. The most common issue is incompatibility between your system and the purchased key. Please first check if your system version (such as Windows Pro edition) meets the key requirements. If the problem persists, contact our 24/7 online customer service, and we will help you replace the key promptly.
How to apply for a refund or exchange?
To apply for a refund or exchange, please contact our 24/7 online customer service and provide the following information: • Your order number • Relevant screenshots (e.g. activation failure prompt, purchase details, etc.) We will process your request as soon as possible.
How long does a refund take to arrive?
Refunds for PayPal payments are usually processed instantly. For bank or credit card payments, funds generally take 7-10 working days to arrive, depending on your bank’s processing time and local regulations. Feel free to contact our support team anytime if you have questions about your refund status.
About Returns and Exchanges
Please activate your license within 180 days after purchase. Free key replacement is available for any issues occurring within this period.
Can a Windows 11 product key activate Windows 10?
Yes. A Windows 11 Pro key is compatible with both Windows 11 Pro and Windows 10 Pro for activation.
What is Windows Enterprise LTSC?
Windows Enterprise LTSC is the Long-Term Servicing Channel edition. It is optimized for superior stability and lower system resource consumption. Please make sure to install the official retail version instead of the evaluation copy.
Where can I find my purchased Windows product key?
Log in to your whokeys account, go to User Center > My Orders, then select View Code to check your key.
How do I activate Windows 10 or Windows 11?
Open Settings > Update & Security > Activation, click Change product key, then enter your purchased product key to complete activation.
Can I enter the product key during Windows installation?
It is not recommended. When installing the system, please select I don't have a product key. After Windows is fully installed, activate the system via Settings > Activation.
Can a Windows Pro key directly upgrade a Windows Home system?
No. A Pro product key is only used to activate a pre-installed Windows Pro system. You need to upgrade or reinstall your system to Windows Pro first.
What does error code 0xC004F050 mean and how to fix it?
This error mainly occurs when your system version does not match the product key (e.g. using a Pro key on Windows 10/11 Home). The basic fix is to install the correct system edition.
You may also try the below upgrade solution (Step 2 and follow-up operations are critical):
1.Restart your computer.
2.Test with these 5 upgrade keys one by one:
3.2K8JW - BNRW7 - J7WDQ - 6V6RG - H8RC6
4.8NXF2 - GVCHY - W37GQ - 27Y24 - 2KCKG
5.YPPGJ - YRNCR - QCJGV - K9CYK - XKXTT
6.XWNYM - YMPF9 - BJ6MY - 3CRTC - KW3GT
7.DBH4C - J7N6X - YFY3P - Y84PB - 7MH26
You will get a prompt to start the upgrade or a notice that the key is invalid. If one key fails, try the next one and restart your PC afterwards. Once the system is upgraded to Pro, use your own purchased key for final activation.
1.Restart your computer.
2.Test with these 5 upgrade keys one by one:
3.2K8JW - BNRW7 - J7WDQ - 6V6RG - H8RC6
4.8NXF2 - GVCHY - W37GQ - 27Y24 - 2KCKG
5.YPPGJ - YRNCR - QCJGV - K9CYK - XKXTT
6.XWNYM - YMPF9 - BJ6MY - 3CRTC - KW3GT
7.DBH4C - J7N6X - YFY3P - Y84PB - 7MH26
You will get a prompt to start the upgrade or a notice that the key is invalid. If one key fails, try the next one and restart your PC afterwards. Once the system is upgraded to Pro, use your own purchased key for final activation.
How to resolve errors 0x80072f8f, 0x80072ee2 and 0x803F7008?
If you run into any of these activation errors, please contact our customer support team for help.
Can your keys activate Windows Enterprise LTSC evaluation version?
No. Our product keys do not support evaluation editions. Please download and install the official retail version via the link below:
https://massgrave.dev/windows_ltsc_links
How to activate Windows Server evaluation edition?
You need to convert the evaluation version to retail edition via PowerShell first, then finish activation with your key. Follow the steps:
1.Launch PowerShell as Administrator.
2.Enter dism /online /get-currentedition and press Enter.
3.Enter dism /online /get-targeteditions and press Enter.
4.Run the command: dism /online /set-edition:serverstandard /productkey: yourkey /accepteula and press Enter.
Note: Replace yourkey with your actual product key, do not add brackets.
What are the minimum hardware requirements for Windows 11 activation?
Your device must meet MS official minimum hardware standards to install and activate Windows 11. You may check full details via the official link. We suggest verifying your PC compatibility before placing an order.
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