Or have an OS in ROM, eg. the Commodore 64. Still can have attacks, but when you can reset the OS with just an off/on or even a soft SYS64738, difficult to do a lot of harm. Can’t update that very easily, but since the Commodore system was perfect, no need. :)
Malware is a curious game…
The only way guarantee winning, is not to boot the OS
Or have an OS in ROM, eg. the Commodore 64. Still can have attacks, but when you can reset the OS with just an off/on or even a soft SYS64738, difficult to do a lot of harm. Can’t update that very easily, but since the Commodore system was perfect, no need. :)