Computer Virus Definitions and its Use

Essentially, DAT files include heuristics designed to locate and to identify given components of malicious software or viruses. Although it is a highly simplified explanation, the heuristics "look" at code currently being executed on the computer and try to find matches to known "bad" code or virus fragments. Without an up-to-date list of known computer threats, this anti-viral scanning process is not effective and does not offer thorough protection for your computer system.

The development of accurate DAT files and the research that goes into an up-to-date awareness of current virus threats accounts for the on-going price associated with anti-virus software. Normally these programs are not a "one-time" purchase but rather are maintained through a subscription commitment. Users pay a fee, normally at intervals of a year, for the privilege of continued access to the latest DAT files. While the anti-virus software itself is not necessarily that complex, the maintenance of the DAT files that make for dynamic anti-virus protection for your computer system is both complex and time-consuming.

Can more than one Anti-Virus Program use the same Definition File?

Like any other piece of software anti-virus programs are designed to be unique entities. Because anti-virus software in its modern, subscription-based format is tied to the research and development activities of the authoring company, DAT files are not interchangeable. Assuredly, however, users are getting full value from the anti-virus companies with which they chose to work since all of these companies make "removal tools" available for new and tough viruses.

Removal tools are small pieces of specialized software free for download from the anti-virus software company's website. Normally these tools are written for new, high-threat viruses not yet effectively addressed by scans generated through DAT files. If your software is unable to remove or to quarantine a virus on your computer system, you will usually be directed to a company web page where you can obtain a removal tool as well as the instructions for its use.

Through the development and evolution of this automated system of updating virus definitions or computer virus definitions, modern anti-virus programs achieve a superior level of "user friendliness" and effective computer security. This level of automation in the management of the anti-virus update process constitutes a valuable service to the computer user.