The I love you, Blaster worm and rouge anti-spyware sites are good examples.

We name Computer Viruses depending on their performance or attacking point. For example:

► I Love You Virus ► This is not actually a worm but in some parts, it is. This virus replicates itself and transfer from one device to another through email. Infected PC got emails with a Head: I Love You

► Blaster Worm ► One of the most dangerous worm on earth. This destroys different. Parts of an OS. Called blaster worm because it terminates S0 of a PC.

Blaster worm and Sasser worm

Certain worms that get into your computer shut down your computer when the worm loads. One specific worm is the MSBLAST.exe and W32.Blaster...

and also if you search on YouTube you can find people renaming files and creating a fake virus message which shuts down your computer.

Probably a blaster worm or a bomb