You Have A Variant of the CoolWebSearch Trojan.

Please Download CWShredder from HERE and run the Program in safe mode . Press the "Fix Button" Let it fix all variants. Next, Close the program and all windows and IE windows and run hijackthis and Post a Fresh log.

Reboot to SAFE mode to run swshredder

How to start computer in safe mode

reboot computer and post a new log