Can not uninstall Exchange 2007 64 bit. -

I am in a bit of a pickle here and hope that someone has some suggestions. Recently, 6 months ago we upgraded to server 2012 and Exchange 2013 64 bit.  Everything has been moved from the 2003 server / 2007 exchange environment and seems to be running correctly.   To be honest the 2003 server was cut off for a few weeks just to make sure that everything was completely moved over to the 2012/2013 environment.  Good news here is it all works except for Exchange 2013 fussing about not being able to see the 2007 exchange server.  

Goal:   Completely remove Exchange from this server followed by removing the server from AD.   It is 7 years old and I want tocut it off forever.

Problem:   Exchange will not uninstall.   Per paid support call to Microsoft I was told if I wanted to completely and properly remove all instances of this server from my Exchange environment and AD environment I must use the add/remove programs method to do so.   Unfortunately this process fails as well as several other items on this server.

Environment / Work done so far:    The 2003 server running 2007 Exchange was also an AD server.  Yes I know it’s a non-supported environment, but it’s what I was handed and it seemed to work for years.  I have checked and this server is not running any FSMO roles anymore.   When I try to remove the application Exchange, through add/remove programs, I get a little gray box that comes up and says… “Microsoft Exchange Server 2007 Setup Initializing”.  After about 3 or 4 seconds the box disappears and nothing further happens.  The same thing happens when I try to “Change” the application.

Other things of interest:

       
• The Exchange Management Console will not load either.The error message is:CLSID:FX:(76dd58f7-54ba-42e3-a2e0-dbfb674539f)    
• The Exchange Management Shell will not seem to execute any commands either.I get several messages, but most have the following:“The type initializer for ‘InstanceContext’ threw an exception.
• I downloaded service pack 3 and tried to install, but that failed as well.
• The follwoing Exchange related services will not run.

1. Microsoft Exchange EdgeSync
2. Microsoft Exchange IMAP$
3. Microsoft Exchange Mail Submission
4. Microsoft Exchange POP3
5. Microsoft Exchange Replication Service
6. Microsoft Exchange Search Indexer
7. Microsoft Exchange Service Host
8. Microsoft Exchange Transport

Any suggestions / help would be greatly appreciated.