What's the most evil computer virus you can think of?

[AutoBahn]

/title.

I think the most evil virus would be one where it stops the user from being able to do anything, including attempting to perform a hard reset, and then promptly attempting to force the physical components of the system to destroy themselves any way they can (ex. spinning up the fans to such a high speed they break, forcing the HDD to scratch itself, etc.)
The second most evil one would probably be one that deletes the OS and simultaneously corrupts the BIOS, A la CIH.

[Ad Bot]

[Jubel]

a virus that always makes your mouse jitter inconsistently, and very minutely.

[Pie Crust]

I would go with one that secretly infects every system in your network and, after every machine is infected, play around with the fan speeds, HDD's arms and PSU power outputs to the point that it causes a total system failure.

[Malleo100]

A virus that makes your computer loveually attracted to you and wants to slice you richard up

[Hammereditor5]

HDD's arms

Not possible.

PSU power outputs

Well, you can load the CPU and video cards to 100%, and overclock the video cards, so this is not hard.

[Frankie²]

all it does is slow down the internet speed
nothing else

[Headcrab Zombie]

https://www.youtube.com/watch?v=scNkLWV7jSw

Specifically, Stuxnet was designed to damage machinery at Iran’s uranium enrichment facility in Natanz. Based on the available information, including data from the International Atomic Energy Agency, experts believe Stuxnet caused a large number of Iran’s centrifuges—essentially giant washing machines used to enrich uranium—to spin out of control and self-destruct.

[Lugnut]

cryptolocker

[Bomb Kirby]

this one

[Candy Apple]

it blocks you out of random websites or urls as they're uncategorized

for instance, you can go on youtube, and you can watch "phone game free review", but you can't view search results for "phone game free review" because it's blocked

[Placid]

a virus that always makes your mouse jitter inconsistently, and very minutely.

http://www.thinkgeek.com/product/ae83/
on sale, too. lol

[Niff]

a virus that makes the CPU runs everything faster than they're supposed to, causing them to catch fire, and burn up your computer

[SquartleTurtle]

a virus that has the webcam on all the time and every 5 minutes it sends the recording to your mommy

[Axo-Tak]

One that would screw up your EFI bootloaders and CryptoLocker every disk inserted. Bonus points for causing hardware damage.

[DestroyerOfBlocks]

a virus that moves your cursor when you click