Can't install volume license office 2013 due to personal trial 2013 on system

Hi,

I needed to use powerpoint 2013 urgently on a weekend.  I tried contacting my IT staff to see if we already owned office 2013.  As I waited for their response, I had the clever idea of installing Office 2013 Trial edition for 60 days, which I did. I was able to do what I needed to do and it turned out we do own office 2013 at the office.

So on Monday I tried to put in our product key to the trial edition, but it wouldn't allow it because it is a volume license product key and not a personal one.

OK, no biggie, I'll just uninstall the 2013 I have and install from the corporate iso.  I did.  Except when I run the newly installed corporate version, it still says at the top "Trial Version (Buy)".

I have uninstalled and reinstalled too many times to count.

I have tried the support tickets about uninstalling:

http://answers.microsoft.com/en-us/office/forum/office_2007-excel/unable-to-uninstall-office-2013-trial-now-i-am-not/aa8a1ec6-8e27-4637-97ba-fe236f3136a3

and the one that gives you an actual fixit program to run to uninstall:

http://support.microsoft.com/kb/2739501

And still, the freaking trial version remains!

I have wasted hours on this problem.  How do I REALLY AND TOTALLY uninstall the trial version of office 2013 so I can install the corporate one?