How do my families computers take priority over the internet connection?

[Tasfdfghjkl]

Umm I wouldn't execute any commands that; first, turns echo off; second, deletes anything \Windows\System32. Best to call him the idiot he is and move along.

Bandwidth scheduling is a 'quality of service' feature that most, or cheap i.e., don't have. Check that router's admin page. It's more likely the bandwidth required vs the bandwidth you got vs the bandwidth you're trying to use.