Without modern computers, mankind would have limited access to Bach's symphonies, Hitchcock's films, and Bob Saget's dog and baby voice-overs. Stock up on entertaining appliances with today's Groupon: for $30, you get computer maintenance and services from Smart PC (a $60 value).

Choose between in-store repair services or one hour of on-site repair performed by Smart PC's crack team of techies, which has more than 20 years of experience. Smart PC's binary buffs disentangle a variety of computer-based problems, erasing persistent error messages with ease and fixing slow computers by downloading pictures of cheetahs. The data-processing professionals can thwart infectious viruses and mend laptop blunders with an in-house laptop specialist. Smart PC uses hardware that's Energy Star certified, and its website includes a user-friendly guide to help customers learn what kind of computing machine best suits their needs and their flux capacitor's speed requirements.