I was able to download it a few months ago and play it without any problems or malware. Maybe try running a better antivirus app (I typically use Symantec Endpoint Protection - the business version, not the crappy home version, or Microsoft Securiity Essentials, and back that up with periodic scans with Malwarebytes Anti-Malware). Hopefully the download itself hasn't become infected!
In any case the game was good, a better sequel to Turrican II than Turrican 3 was, only problem was not having a joystick to play it with. Keyboard control sucked! :p