Windows 7 reached end of support this month, but those with licensed and activated copies of Windows 7, Windows 8 or Windows 8.1 Home or Pro can still upgrade to Windows 10 for free.
1. On the PC you want to upgrade, go to the Download Windows 10 website (https://www.microsoft.com/en-us/software-download/windows10).
2. Under Create Windows 10 installation media, click Download tool now and then Run.
3. Choose Upgrade this PC now.
4. Follow the prompts.