NP, FRiend.
I use spybot and adware. I run them daily.
By that you infer confidence that you are adware/virus free...
Do you recall a recent update in Firefox or Windows? Perhaps a recently installed add-on, or program? What I am looking for here is a cause- It was running fine yesterday, what has changed?
First time I've ever done something like that. I always buy cd's and then download on my media player.