Could you please clarify if this is a 'Corporate' Detection, or a 'Consumer Detection?
In addition is this your software?
Should it be your own Software: Detection Dispute Submission | McAfee Labs
It looks like it shouldn't have been detected for about a month or so, but I've gone ahead and marked the file as clean, to avoid any future problems.
Do people still play CS 1.6? I thought it died (best game ever) I have gotten used to CS Source, and subsequently CS:GO.