I have a laptop which had Office 2007 trial installed. I've manged to
unistall this and install my 2003 version. Everything works ok except for an
"End User Licence Agreement" window appears. I "accept" and continue with
what I want to do. I don't use the laptop too often, but it does not seem to
be asking me to register and never denies me access - just forces me through
this annoying step. What is it and how can I stop it from happening?

I have had this problem too so I took your advice. However, I cant find the Office 2003 files. I checked the shortcuts to all the programmes and it says the target is "Mircosoft Small Office Business Edition 2003" but I can't find that under Microsoft in Progam Files. For some reason Publisher is there but not Word, Exel, or PowerPoint.
Where would I look for them?

You got a point there. I cannot use the "Run As..." command for Microsoft Office shortcuts in the Vista Start menu either.

To find the Microsoft Office 2003 program files I right-clicked the "C:\Program Files" folder and searched for winword.exe, which found the file in C:\Program Files\Microsoft Office\OFFICE11 folder. Here I can use the "Run As..." command directly on the executable file itself.

Hope this helps!

Thanks for that. I actually got some advice on how to do it through the registry by allowing full permissions and agreeing the licence while in that state. I then removed the permissions again. It seems to have solved the problem.