Alexa Toolbar Won't Uninstall

I'm working on a client's windows 2000 pc.  Alexa toolbar has hijacked Internet Explorer.  Every time the computer boots Internet Explorer starts up with Alexa toolbar wanting you to put in personal information.  I've tried several removal tools including Sypbot with no success.  Every time you reboot it comes right back.  Any suggestions appreciated.
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YiogiConnect With a Mentor Commented:
Remove it with HijackThis. It will clean it up.
Another link with info on how to manually remove this irratating software....
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