"F11" - excellent, thanks Robin - I'll give that a go.
XP I think Warren. It's an old PC, it strains now - don't want to load it with new software. Plus the "counterfeit software" warning seems to stop me undertaking certain updates. It just spits the dummy and says no. I cross my fingers that fully updated Trend Micro Pc-cilin and defensive behaviour will keep me safe from nasties