Hi Larry,
In a message to Berk Ozbozkurt you wrote:
 LK> It is not impossible to get a virus simply by unzipping
 LK> something. 
It _is_ impossible to get infected by simply "unzipping something".
 LK> You can also activate a virus by copying a file.
No, you _cannot_.
 LK> Some boot sector files also attach to overlay files as well as
 LK> executables.
Do you know what a "boot sector infector" is?  It's not apparent from your 
post.
Rick
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