Windows 8.1 Pro Lifetime key

Original price was: ₹5,700.00.Current price is: ₹700.00.

  • Support: 32/64 bit Windows 8.1 Pro
  • Validity: Lifetime – Until the pc is formatted.
  • Brand: Microsoft
  • Delivery Time: Instant delivery after the Payment.

Best for those who do not change the Hard Disk/SSD or Format their laptop or desktop. Once the Windows is activated, it stays activated until you format the PC.

(9 customer reviews)

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Windows 8.1 Pro Lifetime key

  • The Windows 8.1 Pro license key will be sent to your email address immediately within 5 minutes after the payment. Please refer to Purchase Process.
  • It will come with official download links and installation instructions.
  • This key will activate Windows 8.1 Pro on one PC and it stays activated till you format it.
  • You will get all official updates and support from Microsoft.
  • Supports all languages and works worldwide. Works for both 32/64-bit Windows 8.1 Pro Editions.
  • You can Update the PC, Login with your Microsoft account – No restrictions.



  • You will receive an email containing the activation key.
  • Each license key is only for ONE computer.
  • If Windows Operating System is not installed on your PC, please install Windows first and then place an order.
  • This key will work only on Windows 8.1 Pro / Professional Edition. This key will not work on Windows 8.1 Enterprise, N, Education, or any other version.
  • Activate the key within 2 days, because our replacement Period is 2 days.


Answers to common Questions:

What is the difference between the Single Time Use (STU) and RETAIL Licenses?

In short, two variants are available and both are valid for lifetime.

The Single Time Use (STU) key cannot be used again, after format or change of the Hard drive / SSD that contains the operating system.

Where as the RETAIL key can be used even after formatting or hardware changes like Hard drive / SSD. In case of motherboard failure, you can also transfer your license to another device.

To find more differences between the license visit FAQ'S

Is Windows 8.1 Pro free?

You can download the Windows 8.1 Pro from the Microsoft website for free. But, if you want to activate it, you have to purchase the key from us.

What is the product key for Windows 8.1 Pro?

A Windows 8.1 Pro license key is a unique alphanumeric code that allows you to activate and authenticate a copy of Windows 8.1 Pro edition on your computer. When you install Windows 8.1, you need to enter this license key to activate it. Activating Windows using a valid license key unlocks the full functionality of the operating system, such as receiving updates, accessing certain features, and personalizing your system settings.

I have Windows 8.1 Installed, Can I purchase a Windows 8.1 Pro Key and Upgrade my Edition to Windows 8.1 Pro ?

If you have Windows 8.1, you cannot upgrade it to Windows 8.1 Pro using a Windows 8.1 Pro key. You need to perform a fresh installation of Windows 8.1 Pro.

If you would like to activate your Windows 8.1 with a key, please contact us. We may be able to provide you with a key.


Looking for Windows Applications like MS Office 2016 Pro Plus Lifetime key – 5 PC License , Microsoft Visio 2016 Professional Lifetime key , Microsoft Project 2016 Professional Lifetime key , MS Office 2016 Pro Plus Lifetime key


External Links:

Get all the features of the Windows Simplified Desktop, Start menu*, Improved security**, and a suite of tools designed for home and business use.

CLICK HERE to download ISO file.

To know more about Windows 8.1, CLICK HERE


Optional: Additional Information for Interested Readers

Windows 8.1 Pro lifetime Key - Requirements

Windows 8.1 Pro lifetime Key - Stop data leaks before they happen

Windows 8.1 Pro lifetime key

Our range of products includes genuine Windows 8.1 product key 2023, licenses, and activations, as well as original product key windows 81, licenses, and activations. All of our product keys windows are authentic and verified, so you can rest assured that you’re getting the best quality software available.

Windows 8.1 Pro lifetime Key - Hard encryption just got easySo, if you’re in need of a Windows 8.1 pro product key 64 bit / 32 bit key look no further than our online store. We offer affordable prices, genuine products, and dedicated customer support to ensure that you have a smooth and hassle-free experience with your software activation.

Additional information


This product requires Windows 8.1 Pro installed on your PC. If the OS is not Installed, download and Install the Operating System from Microsoft Website. If the OS is not Installed, download and Install the Operating System from Microsoft Website. At the time of installing the OS, Paste / Enter the Windows 8.1 Pro Key you received.


Go to PC Settings, select Activate Windows =>Click on Change Product Key / Enter product key => Paste / Enter the Windows 8.1 Pro Key you received => Select Next => Select Activate

9 reviews for Windows 8.1 Pro Lifetime key

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Reviewed by 09 customer(s)

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    The key worked . Thanks a lot.

    December 25, 2023
    Verified Review
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    I have been using Deltakeys for a few years now and they are not only saving me money when evaluating products but also their customer service is second to none. Well done.

    April 15, 2023
    Verified Review
  • Avatar

    Soumyajyoti Ghosh

    I had a great experience with Deltakeys. The ordering process was quick, and I had no issues with the order. Activation of the product was done quickly and efficiently. I would happily use them again.

    February 8, 2023
    Verified Review
  • Avatarrx-user-avatar rx-user-avatar-70 alignnone photo

    Rishi Mer

    The Delta Keys staff were really helpful and patient in trying to activate my computer Windows 8.1 . Unfortunately, they couldn’t get it to work and I had to reinstall Windows 8.1. I really appreciated their attitude and commitment.

    December 16, 2022
    Verified Review
  • Avatar

    Pratik P

    This is my second purchase from Delta Keys, and the product is working perfectly fine. I haven’t encountered any issues, and I would definitely recommend them to others.

    July 25, 2022
    Verified Review
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    Vikramjeet M

    I highly recommend this website for its fast and efficient service. I didn’t have to wait for the email confirmation to arrive, and the delivery couldn’t have been any faster.

    June 2, 2022
    Verified Review
  • Avatarrx-user-avatar rx-user-avatar-70 alignnone photo


    I always purchase my licenses from Deltakeys and I have never had an issue. When you purchase a digital license, you will receive it in minutes with instructions.

    April 13, 2022
    Verified Review
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    I was initially skeptical about whether it would work because there are numerous websites that sell Windows keys, many of which sell dummy keys. But the key I received, worked flawlessly.

    February 2, 2022
    Verified Review
  • Avatar

    Ram Nayak

    As of trust wise, they are the best among existing sites as far according to my knowledge cuz they delivered the product within 10mins and installation within no time. Thank you.

    January 21, 2022
    Verified Review