Help! My kids have been using my laptop,and now it's infected with a virus called the "Backddor.trojan." I have Norton AV program which identifies what it is, but is unable to delete it. I've delelted everything I can find (some of the things won't let you delete them...) but when I re-start the computer and go to IE, it's all back again with pop-ups, porno ads, etc. Any and all help or suggestions would be appreciated! Thank you in advance!