UNABLE TO INSTALL BIT DEFENDER 2013 : error - unable to uninstall etrust automatically

Unable to install bit defender - error : unable to  uninstall etrust automatically

MANUAL REMOVAL :

http://forum.kaspersky.com/lofiversion/index.php/t143641.html

http://ezinearticles.com/?How-to-Completely-Remove-CA-eTrust-Antivirus-in-Seconds&id=3812093

http://homeofficekb.ca.com/CIDocument.asp?KDId=3125&Preview=0&Return=0&GUID=DF325E0AA0AB4264AF47E4BEA49F571B

http://www.wilderssecurity.com/showthread.php?t=175239

http://www.squidoo.com/UninstallCA