The "scour" or Rootkit.Win32.TDSS virus has a long history which can be found here: http://en.wikipedia.org/wik... Here is the primary symptom: after searching for something in your web browser using google, one of the results that you click on redirects you to scour.com. If you've executed ClamWin, Malwarebytes, McAfee, Norton, etc. to find and isolate the virus without any luck--this isn't really a surprise, since this virus attaches to existing system drivers. I only know of one reliable package ......