That Enterprise version comes with corporate support lines and more support that I'd kill for. Just take it up with that corporate support line and they'll fix you right up.
PS. Just so you know. In either case of it being that you are a good corporate owner or just DOWNLOADED Office, again in either case this is all the answer you'll get here. So I've locked the discussion.
I bought an ACER Aspire 4520 Laptop last August 2008, whose OS is Windows Vista Home Basic. It was pre installed with Office 2007 which expired after 30 days. Now, i was able to download an OFFICE 2007 Enterprise license and intalled it to the laptop. The problem was at almost 25% progress of installation, an error message burst out that says, "Error 1913. Setup cannot update file C:\windows\win.ini. Verify that the file exists in your system, and that you have a sufficient permission to update it." I haver no idea what is going on and I dont know how to update this file. Please help. Thank you.