SQL Slammer will probably be the least damaging virus in this ongoing list of infamous malware.
It still warrants a mention, however, as it can probably still claim the title of most annoying.
The damage that SQL Slammer did cause was through overworking routers which caused them to shut down.
SQL Slammer targeted web servers that ran a vulnerable version of Microsoft SQL Server.
The only computers that were affected were the ones that ran this particular server software but, even so, the virus still caused problems by slowing internet access all around the world.
In a fraction under 10 minutes SQL Slammer managed to infect thousands of data centres across the globe.
Once a server was infected the virus would attempt to infect further machines via random IP addresses that it created.
Read more : Malware That Changed The World