Human's nature that ignorance is bliss can make one feel easy enough not to worry about viruses until it is too late. After all, why would you worry? Your computer is working fine. You browse the Internet all the time, and nothing bad has ever happened until... On the surface of things, everything looks normal. However deep inside your computer, something awful could be waiting to hatch. This is why it is so crucial to get an anti virus software download before it is too late. As the saying goes, prevention is better than cure.