>> “Maybe time to upgrade from DOS up to Windows?” <<
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Most viruses are Windows viruses.
There hasn’t been a new DOS virus for 14 years.
I forget where it was that I had read it, but after stuxnet had taken it’s toll last year they had found that a large number of the Iranian systems were operating on pirated software that was susceptible to attack. Apparently as a cost cutting strategy they had decided to use pirated software in most of their military and government systems. Probably not the best security plan.
“Most viruses are Windows viruses.”
No way. Windows machines never get viruses.