How to Upgrade Your Windows 7, 8 or 8.1 OS to Windows 10

Learn how to upgrade Windows 7, 8, or 8.1 to Windows 10 for free if you're running an authentic version of Windows.

When Microsoft released Windows 10 in July 2015, it allowed existing Windows 7, 8, and 8.1 users to upgrade for free. Describing it as a “universal app”, Windows 10 can be installed on multiple devices including PCs, tablets, and smartphones.

To take advantage of the free upgrade, however, you first need to have an authentic copy of Windows 7, 8, or 8.1 installed on your computer with a valid product key.

Product keys are codes that Microsoft gives to each copy of Windows (or Microsoft Office) to help make sure it’s authentic and prevent counterfeiting. To learn a bit more about product keys see our guide here.

You can still download and run a trial version of Windows 10 without a product key but in order to activate it, you’ll need to enter the key that came with your original copy of Windows 7, 8, or 8.1.

To upgrade your operating system to Windows 10, just follow these steps:

How to Upgrade your Operating System to Windows 10

Step 1: Locate your product key

Your product key will often either be:

  • In the packaging, your Windows software originally came in
  • Directly on your computer, if it came pre-installed with Windows
  • In the confirmation email, if you bought it online

Windows product keys are also stored in your computer’s ‘Registry’. If you can’t find it lying around, one way to recover it is using one of the many “key finder” tools available online. Otherwise, you may need to contact Microsoft support to ask for a replacement.

Step 2: Back up your files

It’s always worth backing up your files before doing a major system update or upgrade. This safeguards all your documents in case there are any issues during the installation.

Step 3: Create Windows 10 Installation Media

If you don’t already have any installation media for Windows 10, you’ll first need to create it. You can do this using Microsoft’s Windows 10 media creation tool, which you can find here.

When you open the tool, choose to Create installation media for another PC, and follow the instructions.

How to Upgrade your windows 7 to Windows 10

You can then choose to create the installer on a USB drive or burn it onto a DVD

upgrading operating system

Step 4: Install Windows 10

Run the installation media that you just created on your computer and follow the instructions.

If you want to keep your old settings and files from your current version of Windows, choose to Keep Windows settings, personal files, and apps. You can also choose to just keep your files or install a blank version of Windows 10 with default settings.

Upgrading windows

Step 5: Enter your product key and activate Windows 10

To activate and complete your Windows 10 upgrade you’ll need to enter your product key from your original Windows 7, 8, or 8.1 version. When the installer prompts you, just enter your key and click Next


Activating windows using products key

If for any reason you couldn’t enter your product key during the installation, however, you can still complete the activation later.

After the installation’s complete, open your Windows Settings. Select Update & Security and click on Activation. You’ll see information on your digital license here.

Using digital licenses to activate windows

To enter your product key and complete activation, just click on the Change product key option. Enter your key here.


How to change product key in windows

Once Microsoft’s servers have verified it, click Next. Your activation will be complete and you can now enjoy your new Windows 10!

Windows 10 automatically creates a digital license when it’s activated. If you ever need to reinstall it, you can just follow the steps above and use the same key, if asked for it.

Also, if you log into your computer with your Microsoft email account, it’ll be associated with your product key. This way, you can also reactivate your license through your account during a future reinstallation.

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