Is the newest baddest stuff is on torrents. If system restore and Grif's link at http://www.cnet.com/forums/discussions/how-to-remove-pup-option-603542/#post-f742c795-5881-433b-a29b-6d758efe5cd3 does not fix it then you try bleepingcomputer.com or just wipe the machine.
Almost all the .exe downloads I try I get the requested resource is in use. Researching it it says it's a new Trojan virus that I'm pretty sure I got from Pirate Bay. Which was stupied on my part. I've ran windows defender and spy bot which is all I have on this pc. All the fixes say download rkill or another program but when I do I can't run it cause I get the the requested resource is in use error. Any ideas?