Simpler times
In the mid-to-late-80s a service engineer doing routine maintenance on one of our analytical instrument told the operator that his previous customer in the US had let him copy "Leisure Suit Larry", and he had the disk with him. After they had installed it, people noticed that other networked PC based instruments were "running funny". A couple of days later, after I had got everything cleared and working, "keeping viruses off the computers" was added to my job specification...