Checked Chrome and it was Version 48.0.2564.116 m and then it updated itself to Version 49.0.2623.75 m
I don't have any extensions used for redirecting traffic that I know of which operate like HA.
I think the Facebook installed with windows 10 during the upgrade from Windows 8.1
Additionally since Chrome has now updated itself to Version 49.0.2623.75 m, the crashes so far seem to have stopped !
Hopefully the Chrome update was the problem !
Many thanks for your support. if anymore problems will let you know.
