Thanks for your help KenB. The key that I was told to use to get into BIOS was f8. However that only gave me two choices - first to carry on, and second to delete what had already been loaded, and still carry on. I was quite unable to navigate to anything more helpful. So I decided to try a low-tech approach. The power supply to my desk is a twin switched wall socket. I connected one side of this to a lead terminating in a twin socket. I plugged the hub and its accompanying Infinity modem into this. The other power outlet goes to a strip multi-plug into which I plugged the computer, printer, monitor etc. Now I can leave the hub with power, while turning off everything else. So the cpmputer can now sleep peacefully until I wake it. Sorry for the delay in reporting back, and again thanks for your help.