I enabled the Administrator account as follows: -
C:\> net user Administrator /active:true
*UPDATE - 05/01/2014*
Sadly, this trick didn't work in the long run, mainly because it required me to active the built-in Administrator account, meaning that there were then two accounts listed at boot time - the normal "non-root" user and Administrator.
Running Word as Administrator is easy to do BUT I then have to put up with a User Account Control (UAC) popup each time I start the application, which ruins the end-user experience somewhat.
Therefore, I disabled the Administrator account again: -
C:\> net user Administrator /active:false
and instead, following this post: -
How to Create a Program Shortcut to Run Without the UAC Prompt in Windows 7
created a program shortcut ( which I can drag into the Quick Launch task bar !! ). The shortcut is linked to a scheduled task which starts / runs Word as Administrator.
Therefore, I have a more effective solution, and learned a bit more about the User Account Control (UAC) feature of Windows 7.