Your browser is hijacked. To clean it you need to install and to run Hijackthis. You can download the program from the website http://hijackthis.de. Install and run and than paste the log file into the text box at hijackthis.de, click Analyze button. You will get analyses that will allow you to fix spyware/adware and browser hijacker.
Also you can install and run Spybot Search and Destroy and Lavasoft Adaware. You can download these programs from www.download.com.
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