"My son is a Manager at Best Buy, and said this is the best way to get viruses off your computer easily! I ordered one for myself - It arrived in only 3 days, and was very easy to use. It removed 4 different viruses that my built-in program didn't even find... Now my laptop runs like new again!" It works by finding hidden viruses that your built in programs normally miss - the best part is that you don't have to download anything and it runs separately on this stick. Its easy to use - just 3 sim