# Windows Key Activation Guide

## What is a Microsoft Windows Key?

A Microsoft Windows key is a unique alphanumeric code required to activate your Windows operating system. This 25-character product key ensures 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 label attached to your computer (for pre-installed Windows)
– In your email receipt if purchased digitally

For digital purchases, the key is often automatically linked to your Microsoft account.

## Methods to Activate Windows

### 1. Activating During Installation

When installing Windows, you’ll be prompted to enter your product key during setup. Simply type the 25-character code when requested, and Windows will verify and activate automatically if connected to the internet.

### 2. Activating After Installation

If you skipped activation during installation or need to activate later:

1. Open Settings > Update & Security > Activation
2. Click “Change product key”
3. Enter your 25-character Windows key
4. Follow the on-screen instructions

### 3. Using Command Prompt

Advanced users can activate Windows via Command Prompt:

1. Open Command Prompt as Administrator

2. Type: slmgr /ipk your-product-key

3. Press Enter

4. Type: slmgr /ato

5. Press Enter

## Troubleshooting Activation Issues

If you encounter problems activating Windows:

• Check your internet connection
• Verify you’ve entered the key correctly
• Ensure the key matches your Windows edition
• Contact Microsoft Support if issues persist

## Windows Key Types

There are several types of Windows keys available:

Key Type	Description
Retail	Purchased separately, transferable between devices
OEM	Pre-installed by manufacturers, tied to hardware
Volume	For businesses managing multiple installations

## Frequently Asked Questions

Can I use the same Windows key on multiple computers?

No, a single Windows key is typically valid for only one computer at a time, except for volume license keys.

What happens if I don’t activate Windows?

Unactivated Windows will show activation reminders, limit personalization options, and may eventually restrict functionality.

How do I know if my Windows is activated?

Go to Settings > Update & Security > Activation. It will show your activation status.