Softsphere also has a program to protect against buffer overflow that is called DefencePlus and this is ther description for it:
DefencePlus (previously known as Anti-Cracker Shield) is a powerful proactive multi-level defense for an old-styled processors without NX/XD-bit on-board against hackers, viruses and Internet worms which may try to attack your computer with buffer overflow exploits. It provides a level of defense that is not covered by anti-virus or firewall software.
DefencePlus protects your system against buffer overflow “exploits” which Hackers often use to crack computers on the Internet. These exploits exist owing to the vulnerabilities in many different components of your operating system, as well as those of application software such as network games, Internet-browsers, and e-mail programs etc). In any of these exploitable cases, neither anti-virus nor firewalls would be able to protect you. Only DefencePlus, a multi-level proactive security system, is able to cope with all known and unknown versions of these “exploits”. DefencePlus provides the highest security possible and enables computers to work at their intended optimum level.
So, my question is; do I only need buffer overflow protection if I have a old-styled processor without NX/XD-bit on-board?
Could someone explain this to me?