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Originally posted by ICQ
a Free Product Does not secure you against all possible Viruses. whereas a Paid Product will
Not a single product in the world will secure you against all possible viruses, whether it is paid or not. Even the antivirus makers will tell you that.
For someone with some skill and time it is not that hard to make a virus which will go undetected by all antivirus products. All antivirus products rely on signatures and heuristics. Signatures will only prevent known viruses. If you write your own virus it won't be in anyone's signature database. Heuristics are characteristics common for viruses. But antivirus products cannot put all malicious characteristics in their heuristics since that will flood the user with false positives, after all legit programs delete/modify files too.
As a new virus becomes more and more widely spread it will eventually be picked up by the "security researcher" folks. But that won't prevent the virus from dealing plenty of damage before that.
Never blindly rely on an antivirus product. Certainly don't get the illusion your antivirus product will secure you against all possible viruses. Running any antivirus product is fine, but let common sense do at least 50% of the job too.
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