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).

This article explains a few different ways for how to find a Windows 10 product key. Along with using applications on your computer, we’ve listed additional places you can check to locate the key.

You’ll find a key named “BackupProductKeyDefault,” which contains a valid Windows 10 Product Key. Just to make things more complicated for you, there is a small chance that this might not be ...

1. Product Key. If you got your Windows 10 from an OEM (Original Equipment Manufacturer), i.e., your computer came pre-installed with Windows 10, or if you purchased its copy from Microsoft, you ...

Windows 8.1 and Windows 7 both require a product key for activation, as detailed in another Microsoft support document. ... or in the case of Windows, from a sticker on your PC itself.

I realised that on a few of my PCs, I've not had to enter in the Windows 10 product key for years, despite numerous upgrades and even fresh installations of Windows 10 itself. Over the years, some ...

When you buy a copy of Windows 11/10, you get a product key. This key is used to activate Windows on your computer. It’s a 25-character product key, and it’s important that you keep it noted ...

In spite of the official end of the free Windows 10 update offer on July 29, it seems any valid Windows 7/8.x retail product key still installs Windows 10 for now.

There are still situations where you’ll run into product keys with Windows 10. If you buy a physical retail edition such as on a USB stick or DVD, you’ll still get a product key.