Threats to Computer Security
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Kaspersky Internet Security uses two methods for detecting and blocking these
threat types:
•
Reactive
– this method searches for malicious files using a threat
signature database that is regularly updated.
•
Proactive
– in contrast to reactive protection, this method is not based on
analyzing code but on the system’s behavior. This method is aimed at
detecting new threats that are still not defined in the signatures.
By employing both methods, Kaspersky Internet Security provides
comprehensive protection for your computer from both known and new threats.
1.4. Signs of Infection
There are a number of signs that a computer is infected. The following events
are good indicators that a computer is infected with a virus:
•
Unexpected messages or images appear on your screen or you hear
unusual sounds;
•
The CD/DVD-ROM tray opens and closes unexpectedly;
•
The computer arbitrarily launches a program without your assistance;
•
Warnings pop up on the screen about a program attempting to access the
Internet, even though you initiated no such action;
There are also several typical traits of a virus infection through email:
•
Friends or acquaintances tell you about messages from you that you
never sent;
•
Your inbox houses a large number of messages without return addresses
or headers.
It must be noted that these signs can arise from causes other than viruses. For
example, in the case of email, infected messages can be sent with your return
address but not from your computer.
There are also indirect indications that your computer is infected:
•
Your computer freezes or crashes frequently;
•
Your computer loads programs slowly;
•
You cannot boot up the operating system;
•
Files and folders disappear or their contents are distorted;
•
The hard drive is frequently accessed (the light blinks);
