I am still hanging on to Windows 7 on our main comp, my husband has Windows 10 on his laptop which I don't like much but I think I am a creature of habit and don't like the changes but I am sure I will have to soon.
Louisa Maud
You can still update from Win7 to Win10 for free. If you search for "Windows 10 ISO" you should find Microsoft's relevant page.
The Media Creation Tool will let you create either a USB stick or a DVD with the installation on, and you run the Setup from there.
I would hang on a bit though, as there will be a fresh version of Win10 this month. If you download that, it would mean only one update rather than two, and the chance of reverting to Win7 for a week if you don't like the result.