Hi, I'm John! I will help you with this.
If the laptop came with Windows, the product key is usually embedded in the device firmware. You normally do not receive a product key in the box. Windows activates automatically once you sign in using Microsoft account and connect to the internet.
For Microsoft 365, there is usually no lifetime free version included with laptops. Most devices only come with a trial (for example 1 month) unless the seller included a separate subscription.
To help narrow and understand the issue:
- When you go to Settings > System > Activation, what message do you see there?
- Did the laptop come with Microsoft 365 preinstalled, or did the seller say it includes it for free?
- Where did you buy the laptop (store name or online shop)?
- Do you see any Microsoft 365 card, scratch card, or email with a redemption link?
If you can, please also share a screenshot of the Activation page in Windows. That will help us see the current activation status.
Click "Add comment" to let me know.
Regards,
John J.D.