Windows XP Service Pack 2 has removed raw sockets support which now limits SuperScan and many other network scanning tools. Some functionality can be restored by running the following at the Windows command prompt before starting SuperScan:

net stop SharedAccess

Here are some of the new features in this version.

Superior scanning speed

Support for unlimited IP ranges

Improved host detection using multiple ICMP methods

TCP SYN scanning

UDP scanning (two methods)

IP address import supporting ranges and CIDR formats

Simple HTML report generation

Source port scanning

Fast hostname resolving

Extensive banner grabbing

Massive built-in port list description database

IP and port scan order randomization

A selection of useful tools (ping, traceroute, Whois etc)

Extensive Windows host enumeration capability

Note that SuperScan 4 is intended for Windows 2000 and XP only. Administrator privileges are required to run the program. It will not run on Windows 95/98/ME. You may need to try SuperScan v3 if this will not work with your system.