Hi Mick333,
Welcome to Microsoft Community.
Reactivating your Surface Laptop 6 for Business is a straightforward process. Here are the steps you can follow:
- Sign in with your Microsoft account: Make sure you're signed in with the Microsoft account that was previously linked to your Surface device.
- Select the Start button, and then select Settings > System and then select Activation.
- You'll see activation status messages on the Activation page.
Activate Windows - Microsoft Support
If the device is part of a business or organization, contact your IT admin to reactivate it under the company's management system if necessary.
Your Sincerely
Hahn. W - MSFT | Microsoft Community Support Specialist