I have had a look around on the net and it deffinately looks like it is something to do with bitdefender
Are you running version 8 or version 9 of bitdefender?
------------------------
Edit:
If you are running v8 of bitdefender, follow the instructions below. They came direct from the bitdefender live support which is very helpful. If you have any future problems or if this post does not help you, I suggest you try the live support which you can access at
http://www.bitdefender.com/site/Live-Assistance.html
bitdefender instructions