How To Find Windows 10 Product Key (7 Ways)

by

If you need to reinstall Windows, activate your PC after a hardware upgrade, or transfer your license to another computer, knowing your Windows 10 product key becomes extremely important.

A Windows 10 product key is a 25-character code used to activate your operating system. Without activation, you may see watermark messages, personalization restrictions, and limited access to certain features.

The good news? In many cases, your Windows 10 key is already stored digitally — either in your Microsoft account, embedded in your BIOS/UEFI firmware, or saved inside the system registry.

In this complete step-by-step guide, you’ll learn:

  • What a Windows 10 product key is

  • Difference between product key and digital license

  • All possible ways to find your Windows 10 key

  • What to do if you can’t find it

  • FAQs and expert tips

Let’s get started.

What Is a Windows 10 Product Key?

A Windows 10 product key looks like this:

XXXXX-XXXXX-XXXXX-XXXXX-XXXXX

It is used to activate Windows and verify that your copy is genuine.

Types of Windows 10 Licenses

  1. Retail License – Purchased separately; transferable.

  2. OEM License – Pre-installed on laptops/desktops; tied to motherboard.

  3. Volume License – Used by organizations.

Also, many modern PCs use a Digital License, meaning activation happens automatically without manually entering a key.

Method 1: Check If Windows Is Linked to a Digital License

Before trying to extract a key, check if your PC uses a digital license.

Steps:

  1. Press Windows + I

  2. Go to Update & Security

  3. Click Activation

If you see:

“Windows is activated with a digital license”

Then your key is stored on Microsoft servers and linked to your account.

You don’t need to manually enter a key during reinstall — just sign in with the same Microsoft account.

Method 2: Find Windows 10 Product Key Using Command Prompt

This method works if your key is stored in BIOS/UEFI (common in OEM laptops).

Steps:

  1. Press Windows + S

  2. Type cmd

  3. Right-click Command Prompt

  4. Select Run as Administrator

  5. Type this command:

wmic path softwarelicensingservice get OA3xOriginalProductKey

  1. Press Enter

If your key is embedded in firmware, it will appear on screen.

⚠ If nothing appears, your PC may be using a digital license instead.

Method 3: Use PowerShell to Find Product Key

Another reliable method.

Steps:

  1. Press Windows + X

  2. Select Windows PowerShell (Admin)

  3. Paste this command:

(Get-WmiObject -query 'select * from SoftwareLicensingService').OA3xOriginalProductKey

  1. Press Enter

If available, your product key will be displayed.

Method 4: Find Windows 10 Product Key from Registry

⚠ This method requires care.

Steps:

  1. Press Windows + R

  2. Type regedit

  3. Press Enter

  4. Navigate to:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform

  1. Look for BackupProductKeyDefault

Your product key may be visible there.

Note: Some keys stored here may be generic keys.

Method 5: Use a Third-Party Key Finder Tool

If manual methods don’t work, use trusted tools like:

  • ProduKey (NirSoft)

  • ShowKeyPlus (Microsoft Store)

How To Use ShowKeyPlus:

  1. Download from Microsoft Store

  2. Open the app

  3. It automatically shows:

    • Installed Key

    • OEM Key

    • Product ID

This is one of the easiest and safest methods.

Method 6: Check Product Key from Microsoft Account

If your Windows 10 is linked to Microsoft:

Steps:

  1. Go to Microsoft Account website

  2. Sign in

  3. Check Devices

  4. Select your PC

While Microsoft does not always display the full key, it confirms activation status.

Method 7: Check Windows 10 Packaging or Email Receipt

If you purchased Windows separately:

  • Check the box or card

  • Look for a COA (Certificate of Authenticity) sticker

  • Check email receipt from Microsoft or retailer

How To Find Product Key If PC Won’t Boot

If Windows isn’t loading:

  • Remove the hard drive

  • Connect it to another PC

  • Use ShowKeyPlus or ProduKey to extract key

If it was an OEM key, it’s usually stored in BIOS and automatically activates after reinstall.

Difference Between Product Key and Digital License

Product Key Digital License
25-character code Linked to Microsoft account
Can be entered manually Activates automatically
Used in older systems Common in Windows 10 upgrades

What If You Can’t Find Your Product Key?

If nothing works:

  1. Check purchase email

  2. Contact Microsoft Support

  3. Purchase new Windows 10 license

  4. Upgrade to Windows 11 (if eligible)

Frequently Asked Questions (FAQs)

Is Windows 10 product key stored in BIOS?

Yes, most OEM laptops store it in UEFI firmware.

Can I reuse my Windows 10 key?

Retail keys can be transferred. OEM keys cannot.

Is it legal to use key finder tools?

Yes, as long as you’re retrieving your own key.

Does Windows 10 automatically activate after reinstall?

Yes, if linked to a digital license.

Final Thoughts

Finding your Windows 10 product key is easier than most people think. In many cases, you don’t even need it thanks to Microsoft’s digital license system.

If your PC came pre-installed with Windows 10, your key is likely embedded in firmware and activates automatically.

For safety, once you find your product key:

✔ Save it in a secure password manager
✔ Store a backup copy offline
✔ Link Windows to your Microsoft account

That way, you’ll never worry about activation issues again.