Hijacked By The Dark Net

It all began harmlessly enough; I'd heard about the DarkNet, and wanted to explore a little.
Innocent enough, right?
First, my keyboard would occasionally stop working, and then it started typing on its own; gibberish, mostly.
I became concerned when my computer began to surf on its own, and always to DarkNet sites.
The most depraved, disgusting and disturbing acts danced across my monitor, repeatedly, for hours on end.
Finally, I unplugged the computer, thinking that would be the end of it.
I couldn't have been more wrong.
Now, newer, more horrific images appear every time I close my eyes.