It stands to reason that computers, as complex systems, can suffer diseases similar to those suffered by animals. My computer certainly seems to think so.
Over the past few days, it decided to contract an autoimmune disease, like M.S. in humans.
The immune system of a computer is, naturally enough, its virus protection software. And, when a computer's virus protection software gets overactive, it blinds a computer by treating all data coming to it over computer networks, wireless or otherwise, as viruses, much like M.S. can cause a body's immune system to attack its own nervous system. If the virus protection software shuts down all network connections, no viruses can get it and it perfectly fulfills its virus protection mission. Unfortunately, this also makes your computer, in a world where most of the data is in the cloud, useless.
Of course, discovering the nature of the problem and fixing it was a many hour matter that I entrusted to someone more qualified than me to solve.
Still, needless to say, this little bout of computer autoimmune disease was highly inconvenient, productivity reducing and illustrated once again that complex systems have a tendency to take on a biological nature, even when they are completely inanimate, in principle.