(1) Get you self a good antivirus or a free one .
(2) If you have not already scanned your comp with spybot do that now .
(3) Do an online virus scan to check if you still have any other viruses in your computer. And let us know if the online virus scan still finds any virus or spyware .
If the above steps do not remove the hijack then you would need to
(4) Download hijackthis
(5) Post the hijackthis log on the hijackthis forum for the hijackthis experts to take a look
6) Install and use firefox while browsing
(1) Avg free anti virus software
AVG Free Advisor: AVG Anti-Virus Free
(2) Spybot - Search & Destroy can detect and remove a multitude of adware files and modules from your computer.
The home of Spybot-S&D! Spybot - Search & Destroy - Free Software Downloads and Software Reviews - Download.com
Spybot Search & Destroy v1.4 Install Tutorial
Using Spybot - Search & Destroy to remove Spyware from Your Computer
Ps:- Always check the rogue list(link below) before downloading any antispyware software.If the software you are downloading is on this list then it is spyware itself
Spyware Warrior: Rogue/Suspect Anti-Spyware Products & Web Sites
(3) Trend Micro - Free online virus Scan
Trend Micro - Free online virus Scan
(4) HijackThis Tutorial - How to use HijackThis to remove Browser hijacks
HijackThis Tutorial - How to use HijackThis to remove Browser Hijackers & Spyware
(5) Hijack this removal forum
BleepingComputer.com -> HijackThis Logs and Analysis
6) Firefox
Firefox - Rediscover the Web