If you're using an old licensed version of Windows 7, you can upgrade to Windows 10.
- Go to the Download Windows 10 website.
- Under Create Windows 10 installation media, click Download tool now and Run.
- Choose Upgrade this PC now, assuming this is the only PC you're upgrading. (If you're upgrading a different machine, choose Create installation media for another PC, and save the installation files.)
- Follow the prompts.
- When the upgrade is complete, go to Settings Update & Security > Activation, and you should see a digital license for Windows 10.