virus

Hi. A virus is downloaded every time I sonwload a video. This occur when I press  "Descargar mp4 360". Then the video downloads but I have to clean the computer because of the virus. It was easy in windows 7 but in thw 10 the virus desactivated de antivirus, and I had to make a strong work to repair the computer. I hope this coulb be fixed, becuse I use savefrom to get videos for my classes. Thanks.