A virus can be transmitted through email attachment, by downloading infected programs from websites, or through an infected floppy disk or CD. Some viruses have been programmed to remain dormant for extended periods.
Anti-virus software should be installed on your computer to protect it against known viruses, worms and trojans. Anti-virus software scans and removes threats such as these that your computer may have contracted. The software can also be set to automatically scan disks for malicious code.
What you can do
The best way to prevent viruses, worms and trojans from infecting your computer is to:
- Ensure that you install both firewall and anti-virus software
- Ensure that you have up-to-date anti-virus software installed on your computer
- Ensure that all security patches for operating systems and application software on your network are up-to-date
- Use caution when working with files from unknown or questionable sources
- Not open email attachments if you do not recognise the sender
- Ensure you scan the attachment with anti-virus software before opening it
- Only download files from reputable Internet sites, and be wary when exchanging files with friends
- Never click on hyperlinks in emails received from unknown sources Further information