Sorry Keith I cant think of anything else to suggest at the moment other than to turn off both PCs and restart them and see if it clears itself,stranger things happen at sea they say
I spent a few hours getting my network set up and no matter what I did it didnt work,I rebooted the PC a few times and I rebooted the router a few times too,no success.
I turned them both off and went to bed and when I switched on in the morning everything worked straight away without altering anything,it appears that the router and the PC needed rebooting together to sort it