hi, this issue happens from one of my friend:
here is the situation:
after i installed bitdefender 2012, everytime i log on the system, my screen will be black screen for 15 minutes,, it's a long time.(there is no any other security software in my pc)
if i uninstall bitdefender 2012, everything is fine.
i do not know why, and i have a support tool for you, pls help analysis, thank you