I can't connect to the internet.

How do I sort this out?

My Pc got a bad virus and I couldn't get on the internet.

I did solve this by buying a new PC - and I bought the Norton software with it -so at least I can connect to the internet on the new PC

.

The Norton software  is valid for 3 PC's for a year  but I don't think I can install it on  the computer that has the virus since it cannot connect to the internet and  so the definitions will not be up to date.

Should I just try it in the hope that it is an old virus or is there a more  sensible way of approaching the problem?

Will I just have to reinstall the Widows CD (reformat the drive)?