But sometimes life using DOS was not so great, sometimes you would be using DOS and all of a sudden things like this would happen. This sample also plays a small tune on the PC speaker while it’s printing, so this could be really embarrassing in a office environment.
Those bootsector viruses were incredibly resilient – your computer would be just fine, until you put in an older floppy that apparently still had a virus on it.
So, at my time when I was studying at university we had “computers architecture 2” class, which meant we were basically learning x86 internals and assembly. Writing assembly is not my idea of fun, and for most people it was pretty much the same.
That is, until a freshly graduated teaching assistant assigned us tasks of writing DOS viruses. We first used DOSbox to learn how to do it, and then we booked a classroom that was somehow miraculously left with old, win95 machines on it, and we experimented with real floppies and tried to infect these machines with viruses as a test for our assignments. And then we’ve been re-flashing the machines with Noton Ghost to clean up after ourselves.