Virus Removal Customer Service & Support USA :
A computer virus is a program that attaches itself to, overwrites and/or otherwise replaces another program in order to reproduce itself without the knowledge of the computer user. Generally, the first thing a virus does is attach itself to other executable files in such a way that the virus code is in effect when the infected files are run. Viruses may be written to multiply, to damage other programs, or to alter certain data.
A computer virus is nothing more than a computer program that is coded to remain hidden in your computer. The virus takes advantage of the operating system to copy itself onto other files or disks. When a new disk is inserted into an infected computer, the virus then copies itself onto files on that disk. When an infected disk is inserted into another computer, the virus then copies itself onto files on that computer¡¦s hard drive. The cycle continues as long as files are shared between computers.
In order for your anti-virus software to remain effective, you must update it regularly for the simple fact that there are new viruses being introduced at an alarming rate. All anti-virus software companies offer regular updates to combat these new viruses. Some offer these updates free from the internet once you purchase their software, and some charge a fee for their updates. This is something to consider as you shop around for your anti-virus software. No anti-virus software is 100% effective. Therefore, any anti-virus protection strategy should also include regular back-ups of your data. This won¡¦t prevent any viruses but it will reduce your computer¡¦s down time if you ever catch one.
Here are some indications that you may have a computer virus.
Programs take longer and longer to load.
Hard drive runs even when you are not accessing it.
Files appear on your computer with strange names that you don¡¦t recognize.
Strange graphics appear on your computer monitor.
Your conventional memory is less than it used to be.
Programs act strange or erratically.
This is not to say that your computer has a virus if it displays one of these symptoms. There may be some other problem causing the behaviour. The above examples are just some common indicators of a virus.
Computer viruses are not always responsible for the damage of computers. Damage to hardware, such as Keyboards and monitors are not caused by viruses. Though you may experience strange behaviors such as screen distortion or characters not appearing when typed, a virus has, in fact, merely affected the
programs that control the display or keyboard. Not even your disks themselves are physically damaged, just what’s stored on them. Viruses can only infect files and corrupt data.