HOW TO:
Create a computer virus...
First, you have to know a "Low Level" computer language. Seems backwards, but it's not. A "Low level" language means closer to the architecture of the original system.
A computer language like "Assembly" is by far the strongest (and lowest). However, it may take a page of code to move a line down the screen. This is the "base", but a good programmer will not use it in practice.
The strongest in use today, is C/C++. Actually, the Windows you use today is programmed in "Visual C++". It's very strong. It's down to the bones, and can access any memory location it wants. Hence.. lol... why so many people can screw up your computer. People who know this language. I'd bet my left nut... 90% of the computer viruses are written in C++. Anyone who is well "versed" in Programming... feel free to post here. I program in C/C++ myself most.
Back in the DOS days, I did write the only "push button" virus generation program around. Now I never released it, I did it to learn.. but it did what it was supposed too. Kill the "Config.sys, Autoexec.bat... delete a hard drive whatever.
Today, they (New Viruses) are getting FAR more intense. Same theory, more eloborate.
Some things stay the same. You cannot get a virus, unless you open something executable. Today's viruses can spread faster then cancer. Now your anti virus soft can catch it quick now.. but maybe not as quick as needed. Actually if a programmer targeted you personally, a good chance he would destroy you. This however is a deep discussion. That never happens much really. You need to protect against what is there. What happens most.
There is a "freeware" program called "Avast". It's an anti-virus program. It's as good (and I think better) then anything else out there. Do a search. It has the same "Signature" files, the same "Memory resident" protection. I can't explain all this.. but download it.
No, I don't want anyone out there trying to hurt anyone. However, if you have a real reason to "understand" how these things work... I can give ALOT of info. I hope anything you hear from me, is to protect you and your friends...
Gary :)