Thank you KenB. I pressed F12 & nothing happened. I went to the manual and, using F2 as the screen says, tried to follow the instructions from the manual headed Changing Boot Sequence. This talked about Boot tabs & Boot Device Property which I don't have. What are they anyway? As is normal with computer driven things, I am getting absolutely nowhere. I have decided I can live with pressing F1 every time I want to start this wretched thing, the only alternative seems to be to take it to a shop. Thank you for your help.