I had a problem like this once. I was on Skype just IM'ing my friends and all of a sudden, my webcam light turned on. I pushed my laptop screen upward to the roof (because I was using an attached monitor so it wasn't a problem to do that), I tell my friend: "I think I'm being stalked, bro."
Then this message came on my screen:

I didn't know whether to laugh my ass off at this guy's humorous trolling or if I should've been concerned. He did no damage to my computer from what I could tell, he just spammed me with screaming noises and screen-savers. lol
I did get rid of the virus manually, though. Checked my processes for any suspicious programs, tracked them to my roaming folder, and deleted them. Try checking your roaming folder.
I have more pictures if anyone's interested. :)