Thanks Viking. I've been on the website (excellent, by the way) and I downloaded Malwarebytes Anti-malware because it was recommended there. I ran it and all the bad things it found were quarantined then deleted. However when I start up the internet it still goes to mysearchdial. I don't know if I have got rid of the virus or not.Try the following link
http://malwaretips.com/blogs/start-mysearchdial-removal/