: Many new PCs come with a trial or a 1-year subscription. These are often "digital licenses" tied to the hardware; follow the on-screen prompts to sign in and claim the offer. Risks of Using Unauthorized "100% Working" Keys
: Many unauthorized keys are "volume licenses" intended for businesses. If Microsoft detects they are being resold to individuals, they will block the key, leaving you with an "Unlicensed Product" error. microsoft office 365 product key with activation code 100
If you don't want to pay for a full subscription, Microsoft offers several legitimate free options: Where to enter your Office product key - Microsoft Support : Many new PCs come with a trial or a 1-year subscription
The method of activation depends on how you acquired your license: they will block the key