Commercial Programs- Anti-Toxin (See Also "Detection" section)
This program includes an Init that you copy into your system file that protects against all known viruses. It will prevent a virused file from being opened by generating a "file busy" error. I have tried it against all known viruses and it does seems to be quite effective. It is not totally foolproof, but it is VERY good. A special note about Anti-Toxin. Since it prevents any access to an infected file, all other virus detection and eradication programs (including the one that comes with the program) will cease to work. Some will report an error, others will simply give an infected disk a clean bill of health. You must remove the Anti-Toxin Init before running Detection or Eradication programs. This is made clear in the documentation, be sure to read it.