Internet Explorer -vs- Netscape

For some reason I am getting a Windows Error while exploring the Internet with Netscape and Netscape shuts down. This doesn’t seem to be a problem with IE, but seems that Netscape is having the problems. I went ahead and uninstalled Netscape and reinstalled it (version 4.7), and it ran fine for about 30 minutes, but it is back to the errors again. Any ideas?