# Windows Key Activation Guide
## What is a Microsoft Windows Key?
A Microsoft Windows key is a unique 25-character code used to activate your Windows operating system. This key ensures that your copy of Windows is genuine and allows you to access all features and receive important updates from Microsoft.
## How to Find Your Windows Key
If you’ve purchased a physical copy of Windows, you can find your product key in one of these locations:
– On the certificate of authenticity (COA) sticker inside the Windows package
– On a sticker attached to your computer (for pre-installed Windows)
– In your email receipt if you purchased Windows digitally
## Methods to Activate Windows
### 1. Activating During Installation
When installing Windows, you’ll be prompted to enter your product key during the setup process. Simply type in your 25-character code when asked.
### 2. Activating After Installation
If you skipped activation during installation, follow these steps:
– Open Settings (Windows key + I)
– Navigate to Update & Security > Activation
– Click “Change product key”
– Enter your 25-character Windows key
Keyword: Microsoft Windows key
– Follow the on-screen instructions
## Troubleshooting Activation Issues
If you encounter problems during activation, try these solutions:
– Ensure you’re connected to the internet
– Verify you’ve entered the key correctly (no spaces between characters)
– Check if your key is valid for your Windows version
– Contact Microsoft Support if issues persist
## Important Notes About Windows Keys
– Retail keys can be transferred to new devices
– OEM keys are tied to the original hardware
– Volume license keys are for enterprise use
– Never purchase keys from unauthorized sellers
## Maintaining Your Activation
Once activated, Windows will remain activated as long as you don’t make significant hardware changes. If you replace your motherboard or make multiple hardware changes, you may need to reactivate Windows using the same key or contact Microsoft Support for assistance.