help

can anyone help me with this trojan thing that has been found on my laptop, im not good with computers so patience is appreciated..lol. my son played on a game site and since then my mcafee scan thing has shown i have a trogan horse.. as im not computer literate it woud be very helpful if someone would be able to help.. the file name is iwingameshookIE.dll .. i tried to remove it but it wouldnt .. i tried to quarantine it but it wouldnt.. i tried a system restore and that didnt work.. im assuming its attached itself to my internet explorer but im stuck now.. any help would be appreciated