My bet would be that it's a case of these ever increasing attachments. When installing something, you get tons of stuff you never even knew existed! Not to mention that you would have wanted it! I'm really pssssssssssd here.
Check lately installed software, get rid of everything unknown, or even known. You can always reinstall what you want, just be careful with what comes along.
Sorry if I sound sour, but it's sincere. Rumble mumble... I don't like unwanted lawless to mess in my underpants. And I do definitely think that they should be caught and trialed. I had great trouble with PUP.Optional.Softonic,
http://malwaretips.com/blogs/pup-optional-softonic-virus/, I tried various security programs, no success, it always came back -...