Do i need to pay for renewal from expire?

hello i have got messge that said itz expire and tell me renew it i dont mean to renew i just click and it suddenly got 365 day back i dont know if i have to pay for it my computer come with norton when i bought it i dont write my credit card or anything on my acc . when i go look st my acc from norton wen it got expired in 2011. if i got to pay for it how can i remove the renew? plz replay me i dont want pay the money