Frank Witsil,Kristen Jordan Shamus,Jenna PrestininziDetroit Free PressShow CaptionA computer update Friday wreaked havoc on systems throughout metro Detroit — and worldwide — that affected airlines, infrastructure, banks and health care, delaying flights at Detroit Metro Airport, causing traffic to slow on the Ambassador Bridge to and from Canada and even closing a Dearborn community college.The software glitch created confusion and chaos as people woke up, went to work and tried to travel, because in many cases, the software update prevented other systems from working, and the public was unsure what, exactly, was happening.The software problem, which resulted in such sudden widespread problems that it appeared to be a cyberattack, also caused Microsoft Windows to crash and, for some customers, display a blue screen, which frustrated computer users sometimes call a "Blue Screen of Death."But gradually, as the day progressed, the situation for many seemed to improve as fixes were applie...