On 6/7/2011 1:23, Invisible wrote:
> You have a point. Scanning a file after each time it's modified would seem
> the best approach, but I'm not aware of any product that does this yet.

Yes you are. You just ad hominem'ed them out of your memory.

> So I'm not seeing how a file on a PC with an AV
> product can pose a threat to other systems.

I write a program that writes out an executable file that has a virus in it. 
(Like, say, the copy command.) I write that file to a USB stick, and I give 
it to you.

Or, as has actually happened in the past, you install a program off a 
commercial CD that has been created on a machine that is infected, and which 
therefore includes a virus.

-- 
Darren New, San Diego CA, USA (PST)
   "Coding without comments is like
    driving without turn signals."

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