Spybot is antispyware, not anti-virus and not a firewall.
You need to get a good paid version of firewall and anti-virus software. Brands like Norton, ZoneAlarm, trendMicro. With some trojans, once they got to your puter, even these software won't be able to get rid of them, and you may need to manually delete the culprit fom your puter's registry which is not advisable for you to do if you are a puter novice.
