This is a form of Denial of Service attack. Spam To place the same message all over the place, where it does not belong, to try and get attention or sell services. Spam stands for Stupid Person's Advertisement. Spawning Viruses Spawning viruses create a new program with a file name of an existing program. The idea is for the user to attempt to run the program that they normally run, but then run the virus program instead.
Some viruses are very good at hiding themselves.
Stealth viruses are usually memory resident viruses, running in the memory of the computer at all times to help intercept instructions and control detection of the infection. T Time Bomb A logic bomb activated at a certain time or date. Trojan A program that does something more than the user was expecting, but that doesn't replicate itself, relying instead on the user to pass it on. This malicious program is concealed inside a harmless-looking package, like a game or joke program. TSR Terminate and Stay Resident.