TAC Vista Uninstall Process fails.

Issue

TAC Vista Uninstall Process fails.

Product Line

TAC Vista

Environment

TAC Vista Server Installation

Cause

During the uninstall process, a key in the registry does not get deleted that should.  This flags that the application is already installed, so the uninstall process won't proceed.  It is also impossible to use the "Add/Remove Programs" wizard to uninstall the application.

Resolution

What needs to be done when this occurs is to open the Registry Editor (Start > Run > regedit) and do the tasks described below:

NOTE: Make sure that you do a backup of the registry since modifications in the registry can make your system unstable.

Also make sure that you have a backup of the TAC Vista database and other important project files.


Vista Server

(You should perform this step if you can't uninstall the application from the control panel)

Delete the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{639465AE-9BAF-4D29-B824-D8BFD8615070}


ToolPack

(You should perform this step if you can't uninstall the application from the control panel)

Delete the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{5FFB2771-0543-42A6-AF2B-61FE41D880D4}


These registry keys are the same regardless of versions (TAC Vista IV and later), just to prevent parallel installation of different TAC Vista versions.

When those keys have been deleted, manually remove the program folder. (Default "C:\Program Files\TAC\TAC Vista X.X.X")