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PsL Monthly 1996 May
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psl-monthly-shareware-cdrom-vol4-no5.iso
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viruses.doc
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1995-12-12
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About Viruses
Some shareware vendors "guarantee" that their disks are virus free.
This is frankly impossible and demonstrates either a lack of
understanding of viruses or a lack of regard for the customer's
intelligence.
The most any vendor can say is that all disks and programs have
been virus checked with the latest virus detection software, which
is what we have done with all the programs on this CD.
Some of the popular media like to claim that all viruses come from
shareware. In fact, research has shown that more viruses have come
from retail-only software (and even hardware such as hard disks and
modems with virus-infected software encoded onto their ROMs).
=====Bogus Virus Reports
Every program on our CD-ROMs goes through a review process.
The first step in that process is that our Review Department
software automatically virus-checks the software before our
reviewers are given access to it.
Then the next step is that the reviewers test the software,
so if a virus somehow escaped detection, it would infect files
on our machines and trigger other anti-virus software designed
to catch such changes.
Despite these precautions, every couple of months or so, we get a
letter from a customer saying that his virus detector has found
viruses in files on our CD-ROM.
Although the odds of this being true are extremely remote, we
take nothing for granted. We get out the latest versions of a
half-dozen different virus scanners (including McAfee Scan,
F-Prot, ThunderByte, AVScan, and others) and check the reported
files.
Then we run the reported programs and a couple of other "target"
programs which we intentionally try to infect. After rebooting
from a floppy disk (to get around any possible infection of
the hard disk's boot sector or COMMAND.COM), we check the files,
the hard disk's boot sector, and COMMAND.COM.
The last report we received was that MODZIP12.ZIP and RPATH.ZIP,
both in the DOS\UT_DSKFI directory of the Vol.3, Num.10 CD-ROM,
had infected files. After following the above procedures and
convincing ourselves that files were not infected, we called
the person who made the report.
After explaining the above to him, we also told him that we
would bet that the virus scanner he used was Norton's Anti-Virus,
because that is the one which every bad report we have received
has come from. Sure enough, that is the scanner he used.
So if you are using Norton's, you might want to give yourself
some peace of mind and try a different virus scanner.
What Others Say About Norton's -
We asked members of the Association of Shareware Professionals
about this situation, and here is some of the responses from
virus experts in the ASP:
"I have had plenty of files sent to me [by users] that were
flagged as viruses by Norton's and *NONE* of them has ever been
infected!"
"As a BBS sysop, I have had 5 instances of users advising me that
I had infected files... Of those, 4 were using Norton's and each
of the 4 was a false reading."
"Norton's AV product is known for getting confused... Norton's
is a poor product..."