Dos virus make

Suicide DOS Virus. Edit source History Talk 0. When it does load, it displays a graphical image of a person hanging in a noose with a dialog bubble stating: "Your PC has been infected by the Suicide virus. I will now kill myself. Press D to disinfect" The virus will not disinfect the file when "D" is pressed however. Categories Add category. Cancel Save. There are millions of viruses. Why do some cause illness in humans and other animals? There are almost as many different answers to that as there are viruses.

But I can give you a general evolutionary explanation. Over long periods of evolution, you have a virus that comes into a host—a species—and spreads. One of three things can then happen. One is that the virus can just die out for some reason—everybody can get immune, so the virus can no longer find a host, and it dies out.

The second is that the host can die out. Some viruses that we have around with us—like the common cold virus—are like that. There are many viruses like that, such as HIV. This coronavirus probably is, too. One example is cytomegalovirus, CMV.

Many of us are infected with CMV, without consequence. Somebody can have normal vision on Friday and be totally, irreversibly blind on Monday.

It varies greatly. You need really close intimate contact, blood transfusion or sexual contact. This coronavirus, by comparison, seems to be relatively stable so that it is able to survive in the environment for hours and maybe a few days, and others are even more stable than that. Polio virus is stable even in sewage—you pick it up by drinking contaminated water. It passes through the gut, through the stomach, which is almost like pure hydrochloric acid—and the virus is still stable in that.

So some are amazingly tough, and some are quite fragile. Taylor McNeil can be reached at taylor. Skip to main content. A, built in As he noted at the time, there were a few earlier Apple viruses but from today's perspective PC viruses present the bigger issue, given that a whole industry of antivirus firms have evolved to battle PC malware.

A curious detail about Brain. A was that its Pakistani authors included their names, phone number, and street address. Hypponen contacted them and was told it was a proof of concept to show that DOS was not secure compared with Unix systems. However, that simple test caused chaos for people around the world whose PCs had become infected with Brain. A common feature of earlier viruses, such as Brain, was that they were designed to spread from floppy disk to floppy disk.

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