This is a really good example of the kind of paranoia users get into. It also probably reflects what was being touted around the media at the time. Earlier in 1992, the Michelangelo virus had caused a bit of a media storm after some hardware and software manufacturers accidentally shipped infected products.
I can't find any reference on the web to the German Amstrad CPC virus referred to, but I do remember seeing some CPCs in Dixons in Scarborough in about 1990 which had some kind of anarchistic screen displayed saying it had been hacked, which as a kid I found pretty cool. Someone had obviously sneaked in and loaded it up on the machines while the salesmen weren't looking.
Anyway, fast forward to today and we find this ludicrous - why were users jumping to conclusions about viruses on a machine like the CPC? Similar events are happening today - users seem to jump to extremes - either they ignore the possibility completely that they have clicked on something bad and are now part of a botnet or, at the other end of the scale (like the guy above), that because their computer is running slowly or broken, it must absolutely be a virus. This also extends to either the misplaced notion that Apple machines are immune to malware or that Android devices are riddled with maliciousness. Both incorrect views, but popular ones (and perpetuated by the media in many cases).
Users need independent trusted sources of honest advice and that isn't necessarily found in those who have a vested interest in selling a fix to them.