Can be control if the parent willing enough to learn parental settings on Windows. I last time control nephews by making sure their account don't have admin access and certain application can run. I even restrict the time and day they can use the PC.

Even until now my dad laptop, I only give him user access with no admin rights for fearing he might accidentally install malware/virus. So far laptop haven't had any issues.

That's a big problem. I'm the only one in my family tech savvy enough to do this, the rest are just blank about it.