Free Anti Spam Software

The person who owned this phone before me must have previously bought protection software which has now lapsed but every time I switch the phone on it keeps prompting me to renew / buy, the security licence and when I click ‘exit’ it then goes on to try and bring up live updates, all this only adds to the long time that N70’s take to start up in the first place.
How can I remove this spam?

Thanks.
Thanks Trali, I had a look on that page but could not find anything that would help, maybe I am not looking in the right place on the site ?

ive tried spybot and avg, but i dont really get how to erase after the scan.i tried with spybot and nothing disapeared from the list it got from scanning when i clicked fix problems, even though it said fixed 9 problems

please i desperatly need help to get these virus’s out, but i cant trouble my parents for money to fix the comp, so i have to find a free software to remove this

other note:spam=reported

thank you to anyone who answer my question(not just posting an answer, actually answering this question)