Where does the virus come from in the computer?

Internet

Most of the chances of getting virus in computer or laptop are from internet, when we download any file from internet, virus comes with it and we are not even aware.

external device

Most of us take some files, audios, videos from our friends and put them in our computer, there is a possibility of virus coming with it, which affect our computer.

crack software

Many people install crack software with the help of internet, this software is more likely to contain virus, which spoils our computer.