Your Windows license key is usually in one of three places: a sticker on your device, inside Windows itself, or in your Microsoft account

If you bought Windows pre-installed on a computer, the key is often on a sticker attached to the back or bottom of the machine. If you installed Windows yourself or upgraded from an older version, the key may be stored in your system settings or linked to your Microsoft account. The location depends on how you obtained Windows and when.

Finding your key matters when you reinstall Windows, move it to a different computer, or need to prove you own a legitimate copy. The method you use depends on whether you still have the original sticker, whether your copy is tied to your Microsoft account, or whether you need to retrieve it from your current Windows installation.

Key Takeaways

  • Physical license keys appear on stickers attached to your computer's case, usually on the back or bottom.
  • Windows 10 and later versions often store your license in your Microsoft account rather than on a physical sticker.
  • You can view your license key directly in Windows Settings under System > About on some machines.
  • Third-party tools like Belarc Advisor or Speccy can retrieve your key from your current Windows installation if the sticker is missing.
  • If you upgraded from Windows 7 or 8 to Windows 10 or 11, your license is tied to your device hardware, not a traditional key.

Check the physical sticker on your computer

If you bought a desktop or laptop with Windows already installed, look for a sticker with a 25-character code printed on it. This sticker is usually on the back of a desktop tower, the bottom of a laptop, or sometimes on the side of the case. The key will be labeled as "Windows" or "Product Key" and consists of five groups of five characters separated by hyphens.

Take a photo of the sticker or write down the key exactly as it appears, including all hyphens. If the sticker is worn or illegible, you may need to use one of the other methods below. Keep the photo or written copy in a safe place — you will need it if you ever reinstall Windows or move your license to a new device.

Look in Windows Settings for a digital license

Windows 10 and 11 often store your license digitally rather than requiring a physical key. To check whether your copy is licensed this way, open Settings, go to System, then scroll down and click About. Look for a line that says "Activation" or "Windows is activated with a digital license linked to your Microsoft account."

If you see this message, your license is tied to your device and your Microsoft account. You do not have a traditional 25-character key to find. Instead, when you reinstall Windows on the same device, Windows will automatically recognize and activate using your account. If you move to a different computer, you will need to sign in with the same Microsoft account to reactivate.

Retrieve your key from your current Windows installation

If you have Windows running but cannot find the physical sticker, you can extract the key from your system using free tools. Belarc Advisor and Speccy are two common options. Download one of these programs, run it, and it will scan your computer and display your Windows license key on screen.

Belarc Advisor shows your key in a section labeled "Software Licenses" after it finishes scanning. Speccy displays it under the "Windows" section in the left sidebar. Both tools work on Windows 10 and 11. Save or photograph the key once you find it, since you will need it if you reinstall Windows on a different device or if you need to prove ownership.

Check your Microsoft account for your license

If you purchased Windows directly from Microsoft or upgraded through the Microsoft Store, your license may be stored in your Microsoft account. Sign in to your account at account.microsoft.com, then look for a section labeled "Devices" or "Your devices." This page shows which devices are linked to your account and what licenses are attached to them.

If your Windows license appears here, it is tied to your account rather than to a physical key. You can use this license on any device by signing in with the same Microsoft account. This is common for Windows 10 and 11 upgrades purchased directly from Microsoft.

What to do if you upgraded from Windows 7 or 8

If you upgraded to Windows 10 or 11 from an older version, your license works differently. Microsoft tied the license to your device hardware rather than to a traditional product key. You do not have a 25-character key to find or enter.

When you reinstall Windows 10 or 11 on the same device, Windows will automatically activate without asking for a key. If you move to a different computer, you will need to purchase a new license. The free upgrade offer from Microsoft ended years ago, so upgrading an old key to a newer version is no longer an option.

Recover a lost key or prove ownership

If you have lost your key and cannot find it using the methods above, you have limited options. If you purchased Windows directly from Microsoft, you can sign in to your account and download a replacement key from your purchase history. If you bought it from a retailer or it came with your computer, contact the retailer or manufacturer — they may be able to provide a replacement if you can prove your purchase.

If you are reinstalling Windows on the same device, you usually do not need the key at all. Windows 10 and 11 will activate automatically if your device was previously activated. If you are moving to a different device, you will need either the original key or a new license purchase.

Frequently Asked Questions

Can I use the same Windows license key on two different computers?

No. A standard Windows license is tied to one device. If you try to activate the same key on a second computer, the first one will become unlicensed. If you need Windows on multiple devices, you need to purchase separate licenses for each one.

What if the sticker on my computer is damaged or unreadable?

Use Belarc Advisor or Speccy to extract your key from your current Windows installation. Both tools are free and will display your key on screen. If Windows is not currently running or you cannot boot into it, you may need to contact the device manufacturer or the retailer where you purchased it.

Is my Windows license tied to my Microsoft account or my device?

It depends on how you obtained Windows. If you upgraded from Windows 7 or 8, or if you see "digital license linked to your Microsoft account" in Settings, it is tied to your account and device. If you have a physical sticker with a 25-character key, it is a traditional license key that can be moved between devices.

Do I need my license key to reinstall Windows on the same computer?

Not usually. Windows 10 and 11 will automatically activate on the same device even if you reinstall. You only need the key if you are moving Windows to a different computer or if Windows asks for it during installation.

What should I do with my license key once I find it?

Write it down or take a photo and store it somewhere safe, separate from your computer. Keep it with other important documents. You will need it if you reinstall Windows on a different device, and having a backup copy prevents you from being locked out if the sticker becomes damaged.