Hi there and welcome to PCHF,
Sounds like you've got a nasty infection there.
If you could follow this guide please and we'll get you sorted
http://www.pchelpforum.com/hijackthi...a-prework.html
Also, I suggest getting rid of Norton, it's a rather incompetent piece of bloatware that does nothing but slow your computer and tell you that you have viruses it cannot remove
Instead, I recommend you get AVG, it's free and works wonders:
AVG Free Advisor - Free antivirus and anti-spyware downloads