WARNING: This site is intended for online use only; mass-downloading of pages degrades the server and is prohibited.
If you attempt to use tools to mass-download the site, you may be blocked permanently by automated software.
If you want to read this CertiGuide offline, please use one of the links on the left to purchase a convenient PDF copy. Thank you.

Read this whole guide offline with no ads, for a very low price!
Click Here!

Custom Search






Table Of Contents  CertiGuide to A+ (A+ 4 Real)
 9  Chapter 4: Diagnosing and Troubleshooting in the Windows OS
      9  Virus – Computer (Age) Illness

Previous Topic/Section
Virus – Computer (Age) Illness
Previous Page
Pages in Current Topic/Section
1
Next Page
Removing Viruses
Next Topic/Section

Protecting Your Computer from Viruses

Using your computer without any antivirus protection is like driving a car with bad headlights – perhaps you will have an accident perhaps not. Therefore, how do you protect yourself against viruses? To begin with, be careful about e-mail attachments. It’s good to trust your friends in real life, but remember a virus your friend has can find your address in friends address book and fake a message to you. If you get a suspicious e-mail attachment with an extension such as .com, .exe, .scr (Windows executable, a Screen Saver program) it is most probably a virus.

Every time you se an executable program from internet, or get it another way, you should check it for uses with an antivirus program. Checking for viruses manually all the time would be annoying. That is why antivirus software has a part that can stay resident in the background for you. Then it checks every file that reaches you. That kind of protection blocks known viruses from executing on your computer. Antivirus has a limited protection against the viruses it has never heard of. Antivirus has to be updated with explanations how to detect and disinfect a particular virus. New viruses are discovered every day, antivirus company fights them constantly and makes an updated version of virus definition file for their software. You have to download the latest version of the virus definition file very often - in order have the right virus protection.

You may have noticed an antivirus feature in BIOS. It can only protect you from a very old type of viruses, boot viruses. Those viruses put their code in boot sector of a hard drive in order to start themselves before the system. BIOS antivirus feature doesn’t let any software to overwrite the boot sector, or a more sophisticated version can ask you whether you really want to overwrite the boot sector. . Do not forget to turn off the BIOS AV when you install Windows. Windows needs to have its own bootstrap record in order to start up. Fdisk /mbr is used to repair a defective bootstrap.

Antivirus software is the last and very important in the virus protection chain. You rely on an antivirus companies work in researching viruses they find, so remember to choose a good antivirus company!

A virus can take advantage of an error in Windows to copy itself to your system. It is important to apply Service Packs to your Microsoft Windows and check Windows Update website frequently to patch your OS. And that is not the only line of defense.

Having a firewall turned on while being on the internet will also protect you against viruses and other types of attacks from the internet. Read the section about firewalls for more explanation.

Write-Protecting Floppies

Good practice: When you want to give a copy of your file on a floppy, write protect it. That way you are sure the floppy will cannot get infected if a suspected computer has a virus. Malicious programs can spread on every read and write of the medium.



Previous Topic/Section
Virus – Computer (Age) Illness
Previous Page
Pages in Current Topic/Section
1
Next Page
Removing Viruses
Next Topic/Section

If you find CertiGuide.com useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider buying an inexpensive PDF equivalent of the CertiGuide to A+ (A+ 4 Real) from StudyExam4Less.com. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

CertiGuide to A+ (A+ 4 Real) (http://www.CertiGuide.com/apfr/) on CertiGuide.com
Version 1.0 - Version Date: March 29, 2005

Adapted with permission from a work created by Tcat Houser et al.
CertiGuide.com Version Copyright 2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.