Antivirus XP 2008 is the worst thing I've ever seen. I've used Malwarebytes, Hijackthis, and a host of others. They all find it and delete the files or for the programs that want you to pay to delete, I go through and delete them and reg entries. I've gone through everything offline and all looks good. Then I connect to my router, start the computer and it's there again.
I may spend another hour or so trying to fix it, but I bet I'll be reformating the HD