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You don't need an anti virus program on a computer that is not connected to a net or the internet and does not run or load any external programs as long as the computer is clean to start.
Why does everyone want to connect their computers to the internet if it is not necessary. At work we have a server (lan cabled) that controls about 10 terminals where the staff can access the necessary programs. The terminals do not have disk access and the server is not connected to any outside lines. It has been running for 18 years now on the same basic lan cabling although we have occasionally updated the server, operating system and terminals.
For internet we use a separate set of computers and if you steer clear of the social networks and automatic updates etc. you don't get many attacks.
Barry
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