Isearch.whitesmoke.com - Norton not detecting and cleaning up

Hi, 

 

I have had two support people from Norton try and remove Isearch.whitesmoke.com - but to no avail.  They ran deep scans,  went into the registry and deleted several files.   I also downloaded Norton's most advanced virus detection tool,  put onto a DVD,  started my computer from the DVD,  and did a deep scan of my computer.   No viruses were detected.    Unfortunately,  the virus is very real and is putting my records and system at risk.    Any coaching on how to remove this,  is appreciated.  

 

Here is information on the virus: 

 

Isearch.whitesmoke.com is a dangerous malware propagated by a destructive browser hijacker that modifies MS Windows hosts file and redirect/hijack Internet explorer, firefox and chrome web browsers. Isearch.whitesmoke.com bothers computer users because of its search redirection. Isearch.whitesmoke.com may appear after downloading free media programs or porn content images and videos. Isearch.whitesmoke.com may steal credit card data, modify Windows registry files and cause system inconstancy and shutdowns. Isearch.whitesmoke.com is a security and privacy risk that may significantly reduce the performance of your PC. Isearch.whitesmoke.com poses a dangerous threat to any computer or system and should be terminated immediately.