You have not been protected, however, against any bugs that burst on the scene since then, nor against those that are likely to come along in the future. So, yes, if you do a lot of e-mailing, if you download programs from the Web, and if you swap storage media, including floppies or rewritable CDs, shell out for an antivirus program, be it from McAfee or Symantec. Then periodically update your virus definitions. The updates can be downloaded from the Web site maintained by the vendor whose software package you purchase. When I click on OK, the message disappears.
Webmasters can add content to a site in at least one of two ways.
They can hire specialists who create the content, write it into the site's pages and maintain that content, making sure that it is up to date at all times. That can be very expensive. Or a Webmaster can go to a new breed of Internet company, a content provider, and pick and choose from the provider's vast database of information. That information then appears on the Webmaster's own site as a skin, an overlay that gives surfers the impression that the data are an integral part of the Web site. Taking the skin approach saves the Webmaster a lot of money.