At first, I had a virus/trojan/malware that kept bringing up pop-ups to a winantivirus program. Finally, I made it stop popping up advertisements, but I still have trojan agent winlogonhook. I delete it on spy sweeper, and it just comes back. I have done this many times, and I dont know what to do about it. I also have tried to use norton antivirus, ad-aware, and windows defender. I have hijackthis if you want me to show you a log.

Please help me... and thank you in advance.

This may help you:
http://forums.majorgeeks.com/showthread.php?t=88615
Let us know how you make out

Hopefully my advice will help you...Please post back with your results....thanks