I have installed Office Enterprise 2007 on my new PC, following the death of
my old PC. I am running Windows 7 Home Premium. This is the same version of
Office that I was running on my old windows Vista machine.

On day one the Office Application installed okay, activated and was fully
working. On day 2 it stopped working, giving an error message that said
"Microsoft Word has not been installed for the current user. Please run setup
to install the application." I get similar messages for Excel etc.

I've tried uninstalling and reinstalling, and using the advice in the
Knowledge Base to delete opa12.dat. None of this has any effect on the fixing
the issue.

I'd appreciate some help with fixing this.