Malware: Privacy Components

I have been infected by the phony anti-spyware program "Privacy Components".  It has displaced the Windows desktop with its own page. I can access my programs only by going through Windows Task Manager (on Windows Home Premium).  I am running Norton AntiVirus 2009 which did not recognize this malware initially, or on subsequent scans.

 

I will appreciate any advice on how to rid this from my computer.

 

Thanks