Win 10 stops being a free upgrade after this coming Friday. Today, daughter decided she wanted the upgrade, so I imaged the drive and did the upgrade to the new OS, figuring that if she wanted to revert to Win 7, it's easier and more foolproof to go with an .iso than messing around with Windows rollback, because the latter sometimes works and sometimes doesn't. Thus far, she seems pretty happy with the way the upgrade went (I chose not to allow Win 10 defaults, as she was used to her existing settings).
When I built that laptop for her, I designed in upgrade capability, so I stuffed in 4 Gb RAM that could be quadrupled if needed and a relatively fast (for the time) L3 CPU, also fairly easy to replace. But all in all, it's actually more than W 10 needs, so the upgrade was not problematic. At present, it seems to be a hit - at least, I've not heard any screams from her room.