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Virus Protection

QUESTIONS

1. Is it alright to save my dial-up password/UserID/Username?
2. Is my Internet Service Provider (ISP) accountable when my dial-up account is hacked?
3. What is a Virus?
4. How would I know if my computer's affected by a virus? What are the symptoms of virus infection?
5. My computer has a virus! What shall I do?
6. How can I prevent viruses from getting into my computer?
7. What sort of virus checking do you do on Inbound mail? How about outbound mail?

ANSWERS

1. Is it alright to save my dial-up password/UserID/Username?

   You may save userID/username in your computer, but not your password.

   Being the owner or authorized user of the account we discourage you from saving your password in the computer because it becomes easy for anyone to use the account without your knowledge.
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2. Is my Internet Service Provider (ISP) accountable when my dial-up account is hacked?

   No. Your ISP should not be held accountable for any unauthorized use of your account for it has no control over how you use your internet connection.
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3. What is a Virus?

   Computer Virus is a piece of executable code (program) that attaches itself to the computer files, boot sector or partition tables. Virus has the unique ability to replicate, and in most cases, deliver payload or damage routine.

   Types of Viruses

   Boot-sector Virus
   The boot record is that part or the system software containing most of the instructions for booting, or powering up, the system. The boot sector virus replaces these boot instructions with some of its own program. Once the system is turned on, the virus loaded into the main memory before operating system. Any diskette that is used in the drive of the computer then becomes infected.

   File Virus
   File viruses attach themselves to executable files-those that actually begin a program. (These files have the extensions .com and .exe). When the program runs, the virus starts working, trying to get into main memory and infecting other files.

   Worm
   The worm spreads by replicating itself. It travels through networks to different computer systems, then makes many copies of itself, wasting vast amounts of computer time.

   Trojan Horse
   The Trojan horse covertly places illegal, destructive instruction in the middle of a legitimate program, such as a computer game. Once you run the program, the Trojan horse goes to work, doing its damage while the user is blissfully unaware.

   Macro Virus
   This is a computer virus that is encoded as a macro embedded in a document. Macro is a single character symbol, name key or work that performs a whole series of actions or commands

   Virus Definition
   The virus definition or the virus pattern is the database of specific patterns that indicate the presence of a computer virus. This virus pattern is used by the antivirus utilities to detect the virus infection.
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4. How would I know if my computer's affected by a virus? What are the symptoms of virus infection?

   a. Appearance of inadvertent messages.
   b. Display of weird graphics and playing of music/sounds.
   c. Changes in the file size or content.
   d. Reassignment of the computer resources (such as IRQ vector, I/O addresses and DMA channel.
   e. Unaccounted use of the memory or reduction of its size known to the computer.
   f. Longer disk activity.
   g. Strange behavior of the hardware.

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5. My computer has a virus! What shall I do?

   a. Run the virus detection utility installed on the computer.
   b. Reboot and run the rescue (or emergency) diskettes.
   c.If the virus could not be removed, choose quarantine or delete the file, if possible.

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6. How can I prevent viruses from getting into my computer?

   a. Always enable auto-protect or auto-detection of virusses.
   b. Always update virus definition.
   c. Backup files.
   d. Always have disks write-protected.
   e. Never lend disks to others.
   f. Never copy files from any unknown sources.
   g. Never use pirate softwares.

   source: www.whatis.com
   MFI's Advanced Microcomputer Hardware Servicing Manual

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7. What sort of virus checking do you do on Inbound mail? How about outbound mail?

   Our virus scanner server does body checking of inbound & outbound emails and restricts or rejects the emails or attachments detected to contain these:

   a. Attachment extensions:
   exe|bat|com|lnk|asd|shb|vb|wsf|wsh|pif|scr|chm|hta|shs
   vbs|vbe|js|jse

   b. Double extension:
   ILOVEYOU
   Fwd: joke
   Mother's Day Order Confirmation
   Dangerous Virus Warning
   Virus Alert
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