Kitz E Kat
I have checked Device Manager as there was a separate problem with the printer, but there was nothing else wrong and, as I said, once its going, it just keeps going. Only card installed is the graphics cards - sound is on-board, modem is external serial and printer is USB.
I did think that I had a power problem - once the power gave up but I managed to sort this out - don't know how. The fan on the Mobo was sticking but I've cleared that - and the CPU fan (just in case) - with a good blast of air, but I don't seem to have a heat problem - seems more like a cold problem.
Any other ideas anyone?