# Windows License Activation Guide
## Understanding Windows License Types
Before activating your Windows operating system, it’s essential to understand the different types of licenses available:
– Retail License: Purchased directly from Microsoft or authorized retailers
– OEM License: Comes pre-installed on new computers
– Volume License: For businesses managing multiple installations
– Digital License: Linked to your Microsoft account for easy reinstallation
## How to Activate Windows 10/11
Follow these steps to activate your Windows license:
### Method 1: Using a Product Key
1. Open Settings by pressing Windows + I
2. Navigate to Update & Security > Activation
3. Click “Change product key”
4. Enter your 25-character product key
5. Follow the on-screen instructions to complete activation
### Method 2: Digital License Activation
1. Sign in to your Microsoft account on your Windows device
2. Go to Settings > Update & Security > Activation
3. Click “Troubleshoot” if activation fails
4. Select “I changed hardware on this device recently” if prompted
## Troubleshooting Activation Issues
If you encounter problems during activation, try these solutions:
Error 0xC004C003
This usually means your product key is already in use. Contact Microsoft support for assistance.
Error 0x8007007B
This indicates an invalid product key format. Verify you’ve entered all 25 characters correctly.
Keyword: Windows License
Activation Watermark
If you see “Activate Windows” watermark despite having a valid license, run the Activation Troubleshooter.
## Maintaining Your Windows License
To ensure your Windows license remains valid:
- Keep your Microsoft account credentials secure
- Create a backup of your product key
- Link your digital license to your Microsoft account
- Reactivate after significant hardware changes
## Frequently Asked Questions
Can I transfer my Windows license to another computer?
Retail licenses can typically be transferred, while OEM licenses are tied to the original hardware.
What happens if I don’t activate Windows?
You’ll lose access to personalization features and see activation reminders, but core functionality remains available.
How do I check my activation status?
Go to Settings > Update & Security > Activation to view your current status.