If you're using Internet Explorer, go to Tools >>> Internet Options >>> Privacy. And check the slider for your privacy settings. It may have become set too high to allow or hang on to cookies. I have mine set to medium.

I don't know how Netscape is set up for that now. I haven't used that browser in a couple of years (it got too overblown and hoggy and crashed too much), but I know you can adjust privacy settings there too. Just check your options/preferences menu.

If you set things the way you want and it keeps getting reset to eliminate cookies, the problem may lie with Norton System Works, like BillD and Clinton said. I don't have that program, but there should be setting to adjust in that programs options. Good luck.