Your Windows 10 product key may be necessary to unlock all features -- but it's not easy to find. Here's where to look for the product key (even if it's lost).

Reinstalling software? Older versions of Windows and Microsoft Office require product keys. Here's how to find them before your PC goes kaput.

This post shows how to find Windows 11/10 Product Key using Command Prompt or PowerShell, from BIOS, UEFI or Registry. It works for Retail, OEM, etc, licenses.

Reinstalling software? Older versions of Windows and Microsoft Office require product keys. Here's how to find them before your PC goes kaput.

Want to reuse your existing Windows license key with a new PC? We explain how to determine if that’s possible.

If you're using a local account, use this guide to link your Windows 10 product key to your Microsoft account for easier re-activation.

Windows 10 includes many ways to help you change your product key, and in this guide, we'll show you five of them.

Reinstalling software? Older versions of Windows and Microsoft Office require product keys. Here's how to find them before your PC goes kaput.