I recently downloaded bitdefender 2008 as my kaspersky subscription was finished. I installed and i saw that it made my computer slower than norton. I was unable to start my computer because when i start ,in the desktop my computer hangs out. It is given in many sites that it is the best antivirus but i uninstalled it via safe mode. Please give me suggestions about the best antivirus software. How is NOD32 and mcafee?