I am getting frequent disappearance of Norton Security latest version on Windows 7 PC. Even I tried to remove and reinstall of the Norton Security but on next restart it get disabled again. I have tried many different methods but unable to find a solution. Even I have scanned computer with Malwarebytes, HitmanPro, Emsisoft, Trojan Remover tool. But they found nothing on my system. What will I do now? Please help.