Sites like Keysfan or Mr Key Shop sell OEM (Original Equipment Manufacturer) keys at significant discounts.

Directly through the Microsoft Store is the most reliable method.

: OEM keys are legally tied to the first motherboard they activate and cannot be transferred to a new PC later, unlike Retail keys. 2. How to Activate Once you receive your 25-character digital key via email: Open Settings > Update & Security > Activation . Select Change product key . Enter your code and click Next to activate. 3. Verifying Your Key

: Microsoft often sells Windows 11 keys now, but these are backward compatible and will activate a Windows 10 installation of the same edition (Home or Pro). Authorized Retailers :

Buying a online has become more complex since Microsoft shifted focus to Windows 11. While you can still purchase keys, the source you choose determines both the price and the long-term reliability of your activation. 1. Purchase Options