Hi everyone,
I would just like to report that my Phocus problem has been fixed, hoorah! It turned out that it was a problem with the Graphics Card, the IT department have put in another card, so I now have two running together apparently, and my Dxdiag thingy no longer says 'Standard Graphics Card Adapter'. I still only have 8GB Ram but so far this is proving to be sufficient.
Thank you so much for all your advice, I wouldn't have been able to get IT to listen to me or check the Graphics card without it.
Best wishes to you all,
Claire :-)