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What is a virus?

A virus is a piece of programming code usually disguised as something else that causes some unexpected and usually undesirable event. A virus is often designed so that it is automatically spread to other computer users. Viruses can be transmitted as attachments to an e-mail note, as downloads, or be present on a diskette or CD. The source of the e-mail note, downloaded file, or diskette you've received is often unaware of the virus. Some viruses wreak their effect as soon as their code is executed; other viruses lie dormant until circumstances cause their code to be executed by the computer. Some viruses are playful in intent and effect ("Happy Birthday, Ludwig!") and some can be quite harmful, erasing data or causing your hard disk to require reformatting (

What classes of viruses?



Macro viruses. These are among the most common viruses, and they tend to do the least damage. Macro viruses infect your Microsoft Word application and typically insert unwanted words or phrases.


What can a virus do to my computer?

There are many things from wiping out your entire hard drive(all information on your computer) to annoying you while word-processing by bold-facing or italicizing lines at random to causing trouble when trying to print. The list is almost endless.

Why should I be concerned about viruses?

Because they do damage to your files and you can spread them to other computers which will then be damaged.

How do email attachments relate to viruses?

Email attachments are currently the most common way in which viruses are transmitted. If you receive an email attachment who's name ends with .(exe|hta|pif|vbs|vbe|jse|cmd|vxd|scr|lnk|chm|shm|||doc.bat|xls.bat|exe.pif| etc, beware of it. It may be harmful. Always check with the person who sent it before opening it and if you are not 110% sure, never open any attachment.


You will see symptoms such as frequent crashing, programs that worked that now do not, files becoming damaged or disappearing. If you use MS-Word, you can see things happening like sections of text being bold-faced or italicized at random, a window that pops up calling you rude names, printing doesn't seem to work quite right. All of these are symptoms. There are others. In general, look for something that seems to be highly irregular.

How do I get rid of a virus if I am infected?

You will need to have a virus scanner installed on your computer in order to remove viruses. Many of you already have such a scanner on your computer. You will need to keep it updated as much as possible.

What can I do to keep from getting infected?

Use a scanner such as McAfee or Norton which comes equipped with a Virus Shield. This software device will detect viruses as they try to get into your system and alert you.

Where can I find information on the latest viruses?

Try any of the following web sites:

Why there is no senders' email address in notification message?

In notification message I received:

Please contact [BLANK] to resend the new virus-free e-mail.

Why there is no email address to contact to?

This is happen because the virus using empty-from sender with <> or null-reverse-path.
Mostly this is sent by a faker virus such as VBS.Redlof