Windows License Activation Guide

# Windows License Activation Guide

Understanding Windows License Types

Before activating your Windows operating system, it’s important to understand the different types of licenses available:

• Retail License – Purchased directly from Microsoft or authorized retailers
• OEM License – Pre-installed on new computers by manufacturers
• Volume License – For businesses and organizations managing multiple devices

How to Activate Your Windows License

Method 1: Online Activation

This is the simplest and most common method:

1. Open Settings > Update & Security > Activation
2. Click “Change product key” and enter your 25-character license key
3. Select “Activate” and wait for the process to complete

Method 2: Phone Activation

Use this method if you don’t have internet access:

1. Open Command Prompt as Administrator
2. Type slui 4 and press Enter
3. Follow the on-screen instructions to complete phone activation

Troubleshooting Common Activation Issues

If you encounter problems during activation, try these solutions:

• Error 0xC004C003 – The product key is already in use. Contact Microsoft support
• Error 0x8007007B – Invalid product key format. Verify your key
• Error 0xC004F034 – Activation server couldn’t be reached. Check your internet connection

Important Considerations

Keep these points in mind regarding Windows activation:

• Activation is required within 30 days of installation
• Unactivated Windows has limited functionality
• Microsoft periodically verifies license validity
• Transferring licenses between devices may have restrictions

For additional help, visit the Microsoft Support website.