Most of the antivirus companies have been able to detect the Backdoor.optix virus for about half a year now. It is not quite as "powerful" as you described Symantec Virus Information for Optix but at the least, it is still a Backdoor which poses a security threat.

You will want to do an online scan of any computer that my be infected Housecall Online Virus Scan

Then make sure you install and update your antivirus program. Many times people install antivirus software and expect it to protect them against many new viruses. Unfortunately this is not the case, after installing most retail software your definitions can be up to a year old!
UPDATE and you should be fully protected against viruses like optix.

Hope the link and info help.


EDIT: AVOID MOOSOFT IT IS OUTDATED AND WILL NOT REMOVE ANY MODERN TROJANS!!! SEE ATTACHED IMAGE FOR FILES LATEST RELEASE DATE(2002).