When I right-click for a keyword to be searched, it's not google.com rather search.good-search.net.

This looks like a malware problem. Have you tried running an anti-virus scan? Here are some antimalware software that you might want to try: Malware program recommendations: Malwarebytes' Anti-Malware -[http://www.malwarebytes.org/mbam.php] SuperAntispyware - [http://www.superantispyware.com/] AdAware - [http://www.lavasoftusa.com/software/adaware/] Spybot Search & Destroy - [http://www.safer-networking.org/en/index.html] If these don't find it or can't clear it, post in one of these forums for specialized malware removal help: [http://www.spywarewarrior.com/index.php] [http://forum.aumha.org/] [http://www.spywareinfoforum.com/]