If your computer originally came with Windows 8.1 Pro pre-installed by the manufacturer (OEM), the product key is likely embedded in the BIOS/UEFI. In most cases, Windows will activate automatically once you connect to the internet. 3. Phone Activation
The most secure way to activate Windows 8.1 Pro is by using a 25-character product key. If you previously purchased a digital copy or a physical disc, you can find the key in your confirmation email or on the packaging. Go to > Change PC settings . Select PC and devices > PC info . If your computer originally came with Windows 8
If online activation fails, you can use Microsoft's automated phone system: Press Windows Key + R , type slui 4 , and hit Enter. Select your country and call the provided number. Phone Activation The most secure way to activate Windows 8
Click or Change product key and type in your code. 2. Digital Entitlement Select PC and devices > PC info
Follow the prompts to provide your Installation ID and receive a Confirmation ID to activate. Why Activation Matters