Hi,
First you should uninstall the program through your add and remove programs list (go to the Control Panel and double click on 'Add or Remove Programs')
Then you need to run some effective spyware detection and removal programs that will remove malware and hijacking spyware from your system. Here are some great free utilities which are all a must have. Install and run all three to ensure that your system gets cleaned.
HijackThis
http://www.spychecker.com/download/download_hijackthis.html
Ad-Aware
http://www.download.com/Ad-Aware-SE-Personal-Edition/3000-8022_4-10045910.html?part=dl-ad-aware&subj=dl&tag=top5
Spybot
http://www.spybot.info/en/download/index.html
Hope this helps. Let me know if you have any questions.
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