Computer viruses are small software programs that are designed to spread from one computer to another and to interfere with computer operation. A virus might corrupt or delete data on your computer, use your e-mail program to spread itself to other computers, or it may be deleted everything in your computer. Viruses are very easily spread by attachments in e-mail messages or accessing internet. That is why it is essential that you never open e-mail attachments unless you have to check or running scanning on that file.
Viruses also spread through download on the Internet. They can be hidden in illicit software or other files or programs you might download. If you want to stop virus attack , you have to run your antivirus software regularly or run live updates of antivirus, stay informed about recent threats, and that you follow a few basic rules when you surf the Internet, download files.
For example, experts estimate that the Mydoom worm infected approximately a quarter-million computers in a single day in January 2004. Back in March 1999, the Melissa virus was so powerful that it forced Microsoft and a number of other very large companies to completely turn off their e-mail systems until the virus could be contained. The ILOVEYOU virus in 2000 had a similarly devastating effect. In January 2007, a worm called Storm appeared — by October, experts believed up to 50 million computers were infected. That’s pretty impressive when you consider that many viruses are incredibly simple.
How Do I Know If My PC Has a Virus?
Here are some signs that your system might be infected:
• Runs consistently more slowly than normal.
• Stops responding or locks up often.
• Crashes and restarts every few minutes.
• Restarts on its own and then fails to run normally.
• Applications don’t work properly.
• Disks or disk drives are inaccessible.
• Printing doesn’t work correctly.
• You see unusual error messages.
• You see distorted menus and dialog boxes.
In many cases, a virus resides inside your computer in an inactive state, waiting for a certain event to happen. Like having a physical virus in your body, you can have a virus in your computer system and not even know it. A virus can wait patiently in your system and attack only on a certain date. Of course, in the time between the moment you contracted the virus and the time it made itself known to you, you may have innocently spread the virus to others.
Stop Viruses Before They Attack
A computer virus can do extensive damage. It can crash your hard disk, destroy all your important data. The most usual symptom of a computer virus is erratic behavior. The destruction can happen at any time or anywhere in your computer. Viruses can spread quickly through today’s intricate cyber world. If your computer starts to act a little weird, the first thing to do is to check for a virus.
If you find a virus in your computer, you will stop viruses before they enter your computer. You can do this by purchasing a good virus protection program. Such a program will check all files for viruses. Once installed, an antivirus program can be set to work in the background. It will check all files before they enter your computer and will alert, if a virus detected by anti-virus, it will inform you immediately, and then you can remove that virus from your computer or sometimes antivirus can also remove that virus from the computer.
Keep Virus Protection Software Up-to-date
New viruses are coming everyday. It seems that there are many people in the world who have a lot of time on their hands and a slightly warped idea of how to use their intelligence. Luckily, companies like McAfee, Symantec, and Panda Software are constantly scouting for new viruses and updating their antivirus software tools. They use any of a growing arsenal of weapons to detect and fight viruses.
You must update your antivirus program on a regular basis. The company will provide you constant updates, if they find new virus. You have to update your antivirus on regular basis so that your computer is completely protected from viruses. Some newer antivirus programs automatically update your antivirus protection as well as the antivirus definitions when you log onto the Internet through a process called live update or online virus scan. They will inform you, that is new definition or new updates.
To keep you protected as much as possible, I recommend purchasing antivirus software that updates automatically. If you update your virus protection manually, please update regularly. a daily update may be a good idea in today’s virus-infested atmosphere.