On reading the threads here I decided to install EMET 4. No trouble at first but when I launched Word 2003 that has Tabs for Office installed (http://office-tabs.com/index.htm) it would not load completely until I removed Tabs for Office. I could not find anything in EMET to source the problem. Could not add the application to EMET since I believe it uses a dll for it to work in Word. I have now un-installed EMET to continue using Word, however would welcome any thoughts about the problem.