Before Mp3 downloading, music lovers had to rely on lesser file formats, such as degradable magnetic tape or yelling into a box and immediately closing it. Safeguard modern technology with today's Groupon: for $34, you get one hour of computer-repair service and hard-drive cleanup at I.T. Niagara (a $135 value).

I.T. Niagara's microprocessor crusaders rescue machines in peril with professional computer-repair services performed in-store. A one-hour scouring session enables technicians to assess the malfunctions of both Mac and PC computers, curing internal illnesses by expunging unwelcome elements such as malware or locating data files lost due to system crashes. After curing computer amnesia, techs administer a full hard-drive cleanup, rearranging and removing files to allow for optimal program speed and thoroughly shuffled solitaire decks. Techs then eradicate dust from fans and RAM slots and wipe keyboards clean. Today's Groupon also arms customers with a discount on antivirus software.