A pilot was flying a small, single-engine charter plane, carrying two leading business executives. He was approaching Seattle airport through thick fog when his instruments suddenly failed. In desperation, he began circling the area, looking for a landmark that would guide him to the airport runway, but after an hour or so, the plane was running low on fuel and his passengers were becoming increasingly edgy. Finally, the visibility improved sufficiently for him to spot a tall building through a break in the fog. He could just make out one guy working alone on the eighth floor. Banking the plane, the pilot rolled down his window and shouted to the guy: "Hey, where am I?" The solitary office worker replied: "You're in a plane." The pilot then rolled up the window, made a 240-degree turn and proceeded to execute a perfect blind landing on the airport runway three miles away. As the plane came to a halt, the fuel ran out. His relieved passengers were greatly impressed by his navigational skills. "How the hell did you do that?" they asked. "Easy," said the pilot. "I asked the guy in that building a simple question. The answer he gave me was 100 per cent correct, but absolutely useless, and from that I deduced it must be Microsoft's support office, and I knew that from there the airport was just a few miles away." Why are computers like air conditioners? They work fine until you start opening Windows.