I posted a solution in a similar thread you started back in october,and you didn't bother to reply to it.

read my post in that thread and have the decency to at least let us know if it works or not.
http://www.techzonez.com/forums/showthread.php?t=12272

And BTW,the reason members refer you to eggheads spyware removal thread is because it is ultimately spyware/malware that is causing your problems.Do a web search on google for "remove search assistant" and you'll see the majority of replies relate to spyware.