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Microsoft Windows Key Activation Guide

Activating your Microsoft Windows operating system is essential to unlock all its features and ensure you receive regular updates. This guide will walk you through the process of activating Windows using a valid product key.

What is a Windows Product Key?

A Windows product key is a 25-character code used to activate your copy of Windows. It typically looks like this: XXXXX-XXXXX-XXXXX-XXXXX-XXXXX. You can find this key in:

• The confirmation email if you purchased Windows online
• The packaging if you bought a physical copy
• A sticker on your device if Windows came pre-installed

How to Activate Windows Using Your Product Key

Method 1: Through Settings

1. Press Windows + I to open Settings

2. Go to Update & Security > Activation

3. Click Change product key

4. Enter your 25-character product key and follow the prompts

Method 2: Using Command Prompt

1. Open Command Prompt as Administrator

2. Type: slmgr /ipk your-product-key (replace with your actual key)

3. Press Enter, then type: slmgr /ato

4. Press Enter to activate

Troubleshooting Activation Issues

If you encounter problems during activation:

• Ensure you’re connected to the internet
• Verify the key hasn’t been used on another device
• Check for typos in the product key
• Contact Microsoft Support if issues persist

Important Notes

• Always purchase Windows keys from authorized retailers

• Avoid using pirated or volume license keys for personal use

• Windows 10/11 keys are interchangeable for upgrades

• You may need to reactivate after significant hardware changes

By following this guide, you should be able to successfully activate your Windows operating system and enjoy all its features without interruption.