PDF download Download Article
An easy-to-follow guide on activating your Windows 8.1 for free
PDF download Download Article

You need to activate Windows 8.1 within a specific time period in order to continue using it. The instructions and activation key are already included in the installer's package, but if you somehow lose the activation key, there are alternative ways to activate the operating system. This wikiHow article covers everything you need to know.

Part 1
Part 1 of 2:

Recovering a Lost Key

PDF download Download Article
  1. Your Windows Product key is buried in the registry, but it can be easily extracted by using a free key retrieval program. Two of the most popular options are ProductKey and Key Finder.
    • Both of these programs are free and can be downloaded from the developers' websites. Both offer paid versions, but your Windows key can be retrieved with the free version.
  2. You typically will not need to install the program. Simply run it and a list of available keys will be displayed. Find the "Windows" entry to find your key.
    Advertisement
  3. Your key will be listed as "Product Key" or "CD Key". The Windows Product Key is 25 characters split into five groups of five characters each.
  4. Advertisement
Part 2
Part 2 of 2:

Activating Windows 8.1

PDF download Download Article
  1. Open the Activation window by pressing Win+R and typing slui 3. Press Enter to open the window.
  2. Enter the key that you either recovered, received with your Windows purchase, or is affixed to your computer on a sticker. You do not need to type the dashes, as they will be added automatically. Windows will automatically attempt to activate as soon as the key is entered.
  3. If the steps above don't work, you can try to enter the key through an elevated Command Prompt. Press Win+X and select "Command Prompt (Admin)".
    • Type slmgr.vbs /ipk XXXXX-XXXXX-XXXXX-XXXXX-XXXXX and press Enter, replacing the XXXXXs with your product key. Be sure to include the dashes. A window should appear saying "Installed product key XXXXX successfully."
    • Type slmgr.vbs /ato and press Enter. A window should appear saying "Activating Windows(R) Your Edition". After a moment, if activation was successful, it will say "Product activated successfully".
  4. If you are still having activation issues, you can call the Microsoft automated activation service. To find the number for your area, press Win+R and type slui 4. This will open the window with the contact information as well as your installation ID.
    • Make sure to copy down the installation ID, as you will need to enter it over the phone. It's long, but necessary to identify your computer.[1]
  5. Advertisement

Community Q&A

Search
Add New Question
  • Question
    My computer does not have a win+R key. Is there a different key I can press?
    Community Answer
    Community Answer
    Win+R is referring to two different keys. Hold down the key with the Windows logo on it (near the bottom, with the icon of four squares grouped into a larger square) and then press the "R" key at the same time.
  • Question
    How do I install Windows 8.1 for free?
    Community Answer
    Community Answer
    Follow the tips here to activate and install it for free.
  • Question
    How do I get a Windows 8.1 Pro activation code?
    Community Answer
    Community Answer
    Very easy. Just search "Windows 8.1 Product Keys" on Google. This cheat is so popular now that even Google publishes it. The list will display a lot of operating systems. Look for the Windows 8.1 Pro OS, and you'll see a key on the right.
See more answers
Ask a Question
200 characters left
Include your email address to get a message when this question is answered.
Submit
Advertisement

Tips

  • Product keys are already included in the Windows 8.1 package. If you already have yours, you don't need to install one using the command prompt.
  • Product keys can only be used on a limited number of computers. If you've reached the maximum number of computers, the key will be detected invalid.
  • This article is written only for tutorial purposes. Always purchase and activate genuine Windows 8.1 OS to avoid software issues.
Show More Tips
Submit a Tip
All tip submissions are carefully reviewed before being published
Name
Please provide your name and last initial
Thanks for submitting a tip for review!
Advertisement

You Might Also Like

Find Your Windows 8 Product KeyFind Your Windows 8 Product Key
Open File ExplorerOpen File Explorer
Connect to WiFi on Windows 8Connect to WiFi on Windows 8
Activate Bluetooth in Windows 8 Turn On Bluetooth & Pair Devices on Windows 8
Factory Reset Windows 8 from Boot Factory Reset Windows 8 from Boot (Restore, Refresh, and Reset Your PC)
Install Windows 8Install Windows 8
Install Windows 8 on an Android TabletInstall Windows 8 on an Android Tablet
Install Windows 8.1Install Windows 8.1
Reinstall Windows 8 Without a CDReinstall Windows 8 Without a CD
Install Windows 8 in VirtualBoxInstall Windows 8 in VirtualBox
Use Remote Desktop on Windows 8Use Remote Desktop on Windows 8
Connect Your Android to Windows 8Connect Your Android to Windows 8
Set Up USB Game Controllers on Windows 8Set Up USB Game Controllers on Windows 8
Change Your Password in Windows 8Change Your Password in Windows 8
Advertisement

About This Article

wikiHow is a “wiki,” similar to Wikipedia, which means that many of our articles are co-written by multiple authors. To create this article, 15 people, some anonymous, worked to edit and improve it over time. This article has been viewed 830,842 times.
How helpful is this?
Co-authors: 15
Updated: May 21, 2024
Views: 830,842
Categories: Windows 8
Thanks to all authors for creating a page that has been read 830,842 times.

Is this article up to date?

Advertisement