Follow the tips and you can simply find operating system info in Windows 7.
1. Select the Start button, type Computer in the search box, right-click on Computer, and then select Properties.
2. Under Windows edition, you'll see the version and edition of Windows that your device is running.
As support for Windows 7 ended on January 14, 2020
I recommend you move to a Windows 10 PC to continue to receive security updates from Microsoft.