Computer viruses can do serious damage to computers. Most viruses can duplicate themselves and cause different degrees of damage, from wiping out all data on your hard-drive to disclosing your personal data. Installing anti-virus software can ensure that your computer is safe from damage caused by known viruses. Most anti-virus software can scan a file whenever it is downloaded, uploaded, opened or saved.

New viruses are created and spread throughout the Internet everyday, so remember to update your anti-virus software with the latest virus definition pack.

Delete any e-mail from strangers. Be alert when opening any email attachments, especially those with extensions like "EXE," "VB," "JS," etc. Do not forward a document if you are not sure whether an email or its attachments are virus-free.