Here, you can see if Windows is activated with a digital license. Conclusion

Before purchasing, users can try the software with full functionality for a limited time. The trial period's length can be customized by the software developer.

If the software is currently activated on an old hard drive or a crashing system, the key is likely hidden deep within your system registry. You can use a legitimate, safe key-recovery tool to retrieve it.

If your computer came with Windows pre-installed, the product key is embedded in the motherboard BIOS. During installation, select "I don't have a product key."

It prevents unauthorized duplication and distribution of commercial software.

Legal Implications of Using Activator Tools for Windows - YTU