What are the best anti-virus software for a dial-up connection?

I have a computer with Windows XP operating system, it is a dial-up connection. I have always had Norton Anti-virus. I have always downloaded it online directly, never using a cd but now for the Norton 2008 version I could not complete the download, and so when I contacted the company they told me they would send me a new installation cd instead. Now I have been reading a lot of customer reviews regarding the Norton Antivirus 2008 version and it does not sound good at all. I want to change to another product. Please tell me what is the best for a dial-up connection. One that will not slow my computer down like people have been saying about the Norton Anti-Virus?

Your connection speed has no bearing on what AV software you use. I gave Norton a toss a couple of years ago. The product that I favor now is BitDefender.

Kaspersky Antivirus 2010 Review