Here is what I got from the tech support. hope this helps for any other who is seeking to solve the same problem:
Hello
Use the below.
Open My Computer then open the Local Disk (C

Open the program files folder.
Click on the tools menu then choose folder options
Click on the view tab and tick the box labelled "show hidden files and folders". Press OK
Open the installshield installation information folder
Search for a folder named {CFBCE791-2D53-4FCE-B3BF-D6E01F4112E8}
Right click on the folder and choose rename. Press the End key on the keyboard and type the word OLD. Press the enter key
Insert the Civilization IV install CD and open My Computer. Right click on the CD drive and choose explore,
Locate the setup.exe file and double click.
This will replace and overwrite any missing components that were preventing the game from being uninstalled normally
To uninstall the game, go to Control Panel>> Add/Remove programs and highlight the game in the list. Choose change/remove and follow the onscreen prompts