While installing SP2 on the sql server 2005, the installation may fail. Whenever the sql server installation fails it creates a log in the following location.
C:Program FilesMicrosoft Sql Server90Setup BootstrapLOG

The above location generally contains following folders and file.
1) Files                (Contains Logs for the installation of the RTM (Release to Market) version of the sql server)
2) HotFix             (Contains Logs for the installation of the Hotfixes and service packs)
3) Summary.txt   (Contains summary of all the sql server products which were installed and                               whether they  Successfully installed or Failed) 

These logs are created for any sql server 2005 setup installation which applies to the installation of the RTM version or any of the service packs and even all the editions of the sql server 2005 viz Standard Edition, Express Edition, Enterprise Edition.
Whenever the sql server 2005 setup fails we need to check the summary.txt located in the above location to get the information for cause of the failure and to know which products were unsable to install.
So during the installing of the sql server 2005 sp2 if the installation fails and when you look at the summary.txt, you may find that one of the cause of the failure is ERROR 29506.
The summary.txt may have the following information
Product                   : Database Services (MSSQLSERVER)
Product Version (Previous): 1399
Product Version (Final)   :
Status                    : Failure
Log File                  : C:Program FilesMicrosoft SQL Server90Setup BootstrapLOGHotfixSQL9_Hotfix_KB921896_sqlrun_sql.msp.log
Error Number              : 29506
Error Description         : MSP Error: 29506  SQL Server Setup failed to modify security permissions on file C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLData for user Administrator. To proceed, verify that the account and domain running SQL Server Setup exist, that the account running SQL Server Setup has administrator privileges, and that  exists on the destination drive.


When you look into the file C:Program FilesMicrosoft SQL Server90Setup  BootstrapLOGHotfixSQL9_Hotfix_KB921896_sqlrun_sql.msp.log you will see the following error


Configuring ACL:
 Object: C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLData   ACL: (A;OICI;FA;;;[SQLServer2005MSSQLUser$CORPDBPRO$MSSQLSERVER])
Action: 0x103
Failed ACL:
  SetSecurityFileDescriptor is failed at the error code 5; Converted SDDL: ‘(A;OICI;FA;;;S-1-5-21-3714694515-4057322299-1779769068-1013)’
        Error Code: 0x80077342 (29506)
Windows Error Text:   Source File Name: sqlcasqlsddlca.cpp
Compiler Timestamp: Wed Jun 14 16:27:11 2006
     Function Name: ExceptionInSDDL
Source Line Number: 65


The main cause of the above error is that there is improper permissions of the DATA and LOG folder of the sql server 2005. In other words the DATA and LOG folders didn’t have Full Control permissions for the user Administrator and as a result the error message says
MSP Error: 29506  SQL Server Setup failed to modify security permissions on file C:Program FilesMicrosoft SQL ServerMSSQL.1MSSQLData for user Administrator

In order to avoid the error we need
1) To start the SP2 installation using an administrator or a user with administrative privileges.

2) All the files and the folder contained in the DATA and LOG must have Administrative privileges with FULL CONTROL permissions.
In order to achieve this right click on the DATA and LOG folder go to sharing and security. Click on the security tab and make sure Adminstrator is present and it has FULL CONTROL. Also go to the advanced tab and click on inherit the permissions to the child objects.
Finally confirm that all the folders and files located inside DATA and LOG folder have Full Administrator priviledge.
Once the permission issue is resolved we can restart with the installation and it will work fine



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  1. Hi,
    thanks for your useful suggestion but i am installing sql server 2008 on my windows vista OS.
    I am getting Error 29506 owing to default user(Not Administrator).

    But the problem is that, I am not getting file on this path
    C:Program FilesMicrosoft Sql Server90Setup BootstrapLOG

    Please suggest me what to do ????
    or if possible then mail me at pawan.sahu86@gmail.com I shall be thankful to you

    Thanks and regards
    Pawan Sahu

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