Apple - Mac - Bake Sale
Summary: PC has a bake sale to raise money to fix problems in Vista.
Music in the commercial
PC has a table set up with home made baked goods. He explains he's trying raise money to fix Vista's problems, because the marketing folks are spending money on an ad campaign instead.
Mac takes a cupcake, and before PC tells him the price, he takes a bite. Then PC gives the kicker: "Ten million dollars. Now you have to pay me, 'cause you had a bite."