A computer virus has the potential to disrupt work, damage data, and even bring your network to its knees. The virus label is loosely used to describe many types of malicious programs. Viruses can be further classified as worms or Trojan Horses, and a variety of others. To protect yourself and your organization from the risk of dame from computer viruses, you just need to follow some common sense steps. Do not open any files attached to an email unless you know what it is, even if it appears to come from a dear friend or someone you know.
Some viruses can replicate themselves and spread through email.
Better be safe than sorry and confirm that they really sent it. Do not open any files attached to an email if the subject line is questionable or unexpected. If the need to do so is there always save the file to your hard drive before doing so. Delete chain emails and junk email. Do not forward or reply to any to them.