The Windows 7 Multiple Activation Key (MAK) can be used to activate Windows 7 Enterprise installed with the Windows 7 Volume Licence DVD provided by Microsoft to enterprise/university customers.
How to activating Windows 7 with MAK:
Make sure your system is connecting to the Internet. During Windows 7 activation, Windows will connect to Microsoft.com for validation.
Click on Start->Control Panel->System and Security.
- Click on System.
Click on Change Product Key near the bottom of the page.
- Enter the Multiple Activation Key when Windows prompts for the Product Key.
Then you can follow the instruction to complete setup.