All of the windows stopped working. Does that mean it's the switch??

Really. Test first

for a diy'er i think ck'ing fuses is the best start.remember they have limited equip and knowledge of the wiring system.correct me if im wrong,we know where we would start but we've done it a 1000 times.

Just having fun. They usually think only fuse so I usually discount that in a case where they want to change a component. Good day mate.

good am, my repair pal friend.