Ened, I am not sure that Vista is the issue. I have found in the past that if I installed Office on another computer or re-installed it on the same computer, it would ask for a product key or activation by Microsoft. I have noticed that this only happens with the first of the Office programmes I opened. It also seems to happen less with Power Point than Word. So when I installed Office onto Vista I opened Power Point first and I did not have to activate this it time.