TonySharpes you are a genius, that has ended an afternoon's worth of searching for the answer!
As an extra, if you want to turn the thesaurus/grammar check off, rename
C:\Program Files\Common Files\Microsoft Shared\PROOF
to :
C:\Program Files\Common Files\Microsoft Shared\PROOFOLD
Change permissions on C:\Program Files\Common Files\Microsoft Shared to Write:Deny (to stop it recreating the folder)
Many thanks again!