The company Phil worked at was a company with highly classified documentation. The thing was that the whole documentation was kept on the computer. So, he needed to pay extra attention in order not to have any viruses downloaded on his computer, because it could do harm to the whole company. So, he decided to protect the computer before something like that happened. After a conversation with some of his colleagues, he decided to install good Whitelisting Software. It turned out to be the cheapest way to protect the computer. By installing this software he was able to quit worrying about any harm that could happen to the documents.