A computer virus is a type of computer program that can copy itself and infect a computer. A virus can literally take control of your computer to perform whatever actions it is programmed to do. Virus can be very dangerous as they can erase information on your hard drive or send personal information stored on your computer to an outside source.
Viruses can be downloaded onto a computer by downloading files from the internet or from USB devices, floppy discs, CDS or any other type of storage device. You should not download files onto your computer unless you are certain of their origin and comfortable with the validity of the source.
Once a computer has been infected with a virus, it is generally recommended that the operating system be completely reinstalled to remove any remaining vestiges of the virus.
In order to protect your computer from Viruses and related programs such as Spyware, Adware and Malware, you should install some sort of Virus Protection Software on your computer. There are free Virus Software available, but as the saying goes, you get what you pay for. It is recommended that you purchase and install one of the leading Virus Software protection programs as these programs are continually updated to combat new viruses as they are discovered. You can find a list of leading virus software protection companies at the top of this page.
Most of the leading virus protection software companies charge a monthly or annual fee for their software. As mentioned, the services continually update their product to combat new threats. If you are connected to the internet, you can choose to have these updates automatically installed as they are made available.