I don’t know what happened to the internet?

Hi Experts,
I’m not sure what causes why I’m unable to access internet?
It started when I stopped my subscription on anti-virus and removed it completely from the system because I kept getting pop up notification even I already cancelled my subscription.
I’m using a dial-up connection and when I try to get on line it just giving a pop box “dialing”.
Before, I was able to access internet without security program.
Can you please help me to determine what causes it and fix the issue?
Any Help ?
Thanks!
