Hey mate,
I tried the repair in add/remove but that didn't do anything, and then I tried to get into Trust Center in Word Options but not being able to use the mouse to select the Trust Center menu meant that was a no go.
I resorted to then searching on google once more and found this soultion which fixed it straight away and with absolutely no bother:
http://support.microsoft.com/kb/940791/en-us?FR=1
Thanks very much for all your suggestions though, much appreciated :)
Cheers