I assume it is Windows 7 Home (not vista, that is an even older OS)
The period for a free upgrade is long gone, 2015 to 2016. You would need to buy a licence for Windows 10/11 to activate.
The Acer appears to be from 2010 without any drivers for Windows 10 from Acer. It may require a clean install wiping all data from the existing drive.
Do you really want to take that route?