So I had some fun today with Microsoft Office and having to ring up to activate the product as it was hosted in a Virtualised Machine and the host was my new Tablet PC.
I couldn't activate online as it didn't like doing this over a proxy that requires authentication!
When I rang and read out the numbers, yes read out - not typed them in like Windows activation...I got told the installation ID is incorrect! They gave me a tech support number to ring that was in US and was closed as I'm in Perth Australia! For reference the correct number for MSDN support is 132058 (option 2, option 2).
I tried to change the registry to change the product key and tried to reactivate again and this was invalid Installation ID too!
Anyway, I uninstalled and reinstalled and then called again and it was still invalid. So the operator then directed me to go to:
C:\Documents and Settings\All Users\Application Data\microsoft\office\data
and delete all of the .bpc files and then run Microsoft Office application again. This produced a correct Installation ID and I was able to activate! Hoorah!