How do i reinstall Mcafee when i have reinstalled windows?

2 weeks ago i paid for another year of mcafee spyware but i had to get a new hardrive and reinstall windows onto my p.c. I have lost mcafee which came on the laptop from dell therefore i have no instalation c.d. How can i get mcafee back on the laptop so i can get the year subscription i payed for. Thanks :D