sql server 2005 uninstallation issues!

Error message when you uninstall SQL Server 2005 or install SQL Server 2005 Service Pack 1:

 "The setup has encountered an unexpected error while Setting Internal Properties. The error is:

 Fatal error during installation"

SYMPTOMS

When you uninstall Microsoft SQL Server 2005, you receive the following error message:

The setup has encountered an unexpected error while Setting Internal Properties. 
The error is

: Fatal error during installation.

This problem occurs when you perform the following operations 
before you uninstall SQL Server 2005:

• You install the Active Directory directory service on the server.
• You install SQL Server 2005.
• You remove Active Directory from the server.

In another scenario, after you move Microsoft Windows from one domain to another domain,

you receive the same error message when you install Microsoft 
SQL Server 2005 Service Pack 1 (SP1).

CAUSE

This problem occurs because the SQL Server user groups do not match the corresponding

 security IDs in the Windows registry.

SQL Server 2005 requires that the SQL Server user groups match the corresponding 

security IDs in the Windows registry to successfully install or uninstall SQL Server 2005.

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WORKAROUND

To work around this problem, follow these steps:

Start Registry Editor, and then locate one of the following registry subkeys:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.2005\Setup

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.X\Setup

Note Only one of these registry subkeys will exist on your computer.

Empty the following registry entries:

SQLGroup

FTSGroup

AGTGroup

Exit Registry Editor.

Uninstall SQL Server 2005 or install SQL Server 2005 SP1.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are

 listed in the "Applies to" section.

APPLIES TO

Microsoft SQL Server 2005 Standard Edition

Microsoft SQL Server 2005 Workgroup Edition

Microsoft SQL Server 2005 Developer Edition

Microsoft SQL Server 2005 Enterprise Edition

Microsoft SQL Server 2005 Service Pack 1

Original Message:

http://support.microsoft.com/kb/919945