So now you've seen some of the threats; what general practices can you use to protect yourself? Whether you're using a standalone system or a LAN, consider following these recommendations:
Install a virus scanner, and update the virus definitions on a regular—daily, or at worst, weekly—basis.
Disable the Outlook or Outlook Express preview pane.
Use at least Medium security settings in Internet Explorer.
Never run email attachments from unknown sources.
Disable bridging in corporate environments to keep users from bridging secure networks to insecure networks.
Never run email attachments, even from known sources, if you weren't expecting to receive them.
Never share your password, not even with a system administrator or technician. ...