I have no worldly idea how many software packages I installed over the past 25 years or more; however, not one has been as troublesome as this one has been.  After deleting other security programs and attempts at installing Bitdefender I finally installed it on the Vista laptop.  Every attempt to install it on an XP machine resulted in my failure.  I quickly say that I do not blame the software.  I blame myself for the failure for not getting it on the XP.  Any number of unknown issues may have caused the failure.  As far as the laptop's use with Bitdefender my only complaint is that it does slow the machine's operation some but not enough for it to be an issue.  The program must work with few problems.  I have not been hacked, phished etc and therefore it does what it says at least on one machine.

Bottom line:  it works but I cannot recommend it highly.
I have no worldly idea how many software packages I installed over the past 25 years or more; however, not one has been as troublesome as this one has been. After deleting other security programs and attempts at installing Bitdefender I finally installed it on the Vista laptop. Every attempt to install it on an XP machine resulted in my failure. I quickly say that I do not blame the software. I blame myself for the failure for not getting it on the XP. Any number of unknown issues may have caused the failure. As far as the laptop's use with Bitdefender my only complaint is that it does slow the machine's operation some but not enough for it to be an issue. The program must work with few problems. I have not been hacked, phished etc and therefore it does what it says at least on one machine. Bottom line:  it works but I cannot recommend it highly.