The Windows Explorer folders option causes left hand section (IE where the folders tree view should be) to appear completely greyed out, apart from a cross in the top-right hand corner. The search option displays correctly.
I have been through the folder options, none of which seem to help. The current settings are :
Use Windows classic desktop
Use windows classic folders
Open each folder in the same window
I feel I have exhausted the explorer options and may either have a corruption or need to sort it out in the registry.