ROBERTS@decwrl.dec.com (George Roberts - page 0571) (11/12/90)
David A. Holland writes: >I suspect the base of C64s in active use is too small at this point to support >a virus. So it's rather a dead issue... Does this mean there are zero C64s? I agree that viruses with immediate noticable side effects need a large population of hosts to support them. However, viruses with very long delays between infection and symptom can survive because they are unnoticed. For example, a virus which is intended to alter a few records of data in a specific database and then hide itself might never be noticed, and might spread through operating systems which are few and far between over a long period of time (years). - - George Roberts ..decwrl.dec.com!teda!ratvax.dnet!roberts