The secdrv.sys driver is used by games which use Macrovision SafeDisc. The driver validates the authenticity of games that are protected with SafeDisc. SafeDisc is designed to prevent PC games piracy. But, since its introduction, there has been controversies because it poses a potential security risk on many Windows computers, as it grants ring 0 (kernel) access to the programs it runs with. Keep in mind that terminating the process may cause the game it was installed with to stop functioning.