edit: nevermind he stopped I guess. dunno why. thanks all who helped
now I'll know what to do if he starts being dumb again
Then why don't you just tell your parents that your uncle is hogging the network?
if I was at my mom's or my dad's, I'd do that, but I'm at my grandmother's house, and nobody else here even begins to understand networking, so they wouldn't see any problem
Reset the router, that should cancel all of his downloads. If that doesn't work try turning off the router for 20 seconds.
I already found out how to block a specifc user, all I need now is to find out which one he is