Here's what happened, OP.
You were writing the script for your pony fan fiction Blockland machinima (you can see 'fanfic' on the desktop, it's usually hidden so your friends won't know the kind of outcast freak you are), you decided it'd be a great idea to get some video editing software for the machinima, so you search 'sony vegas' in to a torrent site and blindly download the first link you see and run it.
Then after some asian script kiddie gains access to your computer by the most obvious rootkit in the world, your computer illiterate knowledge of what 'hacking' is decides that the last person who disagreed with you did it.