Norton Security Premium - stopped working

I’m in need of some help …please. I posted on this Forum a few months ago with the same problem. However the advice I was given fixed the problem - but it has returned. Uninstalled and download another from Symantec.
I have NSP installed on my WinXP and Win7, it’s working fine on my old trusty WinXP.
Help would be appreciated…

Indie7