it starts to try and install everytime I put the disc back in the drive and gets to the point of uninstalling the old version (microsoft office professional and bookshelf for windows 95) which works fine.
I reinstalled that to check if that was a problem which it does not seem to be.
I did have word 2000 as a standalone upgrade and that disc causes the computer to crash if I try to install again just as the new 2003 version does.
I am getting errors and crashes caused by ahead (nero) if that has any bearing.
I suspect that you may have an unstable os if you are getting all kinds of crashes. I have nero 6 and have no problems with it. I can only say that you should try and remove any office components you have before you try and install the update. If you are happy in the registry then you will find it local machine software/microsoft/office/word and also current user same branch except in will be under office 10