Many anti-virus programs detect game files as a “virus” because the game files contained cracked files which make the game run. A lot of these anti-virus companies get paid to do this, that way you buy the game instead.
To prevent this, disable your anti virus, then re-extract the .zip file and the game will run. Every game on this site was tested on our own computers, so you can be insured that it’s not a real virus. Anything your A.V may tell you, is a false positive.