Here Is Solution To Update Now Error
Mods sticky this perhaps?
A few days ago my BD stopped updating. It would give me an error along the lines of "invalid connections, check proxy, etc..."
After reading this forum and searching the web I saw that many others had the same issue and there wasn't any standard fix to the problem (that I could tell). I was a little unsure about what to do, and then I was on another computer later in the day that needed some Windows updating. In doing so, I realized the computer I had that wasn't updating BD had not had any Windows updates recently either. Upon trying to update the Windows, it was giving me an error so I was starting to think that there was something more than just BD not working properly.
After searching around and researching the error Windows update gave me, I figured out the problem. A DNS changing trojan was the cause of the problem and a simple google will give you a lot of sites about it, and how to fix the issue. After running the Anti-Malware program as suggested on some threads here, the virus was located and deleted.
In doing so, my BD and Windows updates began working with no problems. 
