I recently downloaded the new Bitdefender 2011 for my system which I running Windows XP Service Pack 3 (SP3) after reading and viewing good review about the same on Internet and from friends as well. After downloading the setup file, I tried to install the Bitdefender in my system, but was totally unable to complete the installation process. Restarted my system and tried installing again, but still unable to do so. Does anyone know what must be causing this issue? Why I am unable to install Bitdefender in my PC? What I should do to make it work? Please help!!