I installed ZA Internet Security Suite on my mother's laptop after uninstalling McAfee and all its subsequent programs. ZA continues to detect a trojan in the driver files of win32 every few times I begin using the internet. It treats the virus and then restarts, only to have this problem remain. Is this a defect in ZA's ability to treat certain viruses or do I need re-install it again? System is win7 for home.