A computer virus is a malware that enters your system via the Internet without your knowledge. Computer viruses are of different types and constitute different threat levels. Depending on the type, they can change your computer settings and, sometimes, even damage your hard drive and cause data loss. There are hundreds of antivirus programs that can remove computer malware. However, if you do not wish to download external software and want to remove viruses manually, you can choose to restore your computer to a previous date, before your system files and registries were not infected. Writer Bio
