Upgrade of Backup Exec fails with the error "Failed to install SQL Express BKUPEXEC instance with error -2068052413"

Problem

During an upgrade of Backup Exec, the upgrade fails with the following error logged in the installation log file.
This issue is observed with upgrading to Backup Exec 2014 and 15, but not limited to.
 

Error Message

X:\BE\WINNT\INSTALL\SQLExpress\SQLEXPR_x86_ENU.exe" /ACTION=Upgrade /Q /Hideconsole /SkipRules=RebootRequiredCheck /INSTANCENAME=BKUPEXEC /IACCEPTSQLSERVERLICENSETERMSV-225-53: ERROR: Failed to install SQL Express BKUPEXEC instance with error -2068052413. ***To search for information about this error, click herePlease review C:\Program Files (x86)\Microsoft SQL Server\100\Setup Bootstrap\LOG\Summary.txt for more details.The return value for Microsoft SQL Express returned error code: 2226914883.Error while processing CSResults.xml. Error: Could not find file 'C:\ProgramData\Symantec\Backup Exec\Logs\CSResults.xml'..The return code is: -2068052413ERROR: Installation failed with error -2068052413. GetLastError = :0

Overall summary:  Final result:        Failed: see details below  Exit code (Decimal): -2068052413  Exit facility code:  1212  Exit error code:     1603  Exit message:        Failed: see details below  Requested action:    Upgrade  Log with failure:    C:\Program Files (x86)\Microsoft SQL Server\100\Setup Bootstrap\Log\20140703_10060sql2005_Cpu32_1.log  Exception help link: http://go.microsoft.com/fwlink?LinkId=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.50.4000.0

Cause

SQL upgrade fails in the background.

Solution

Follow the Exception help link provided in the Summary.txt

http://go.microsoft.com/fwlink?LinkId=20476&ProdName=Microsoft+SQL+Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=10.50.4000.0 

Uninstall the existing SQL Server Native Client from the server and run the Backup Exec upgrade process again.


Note1: The help link is currently broken link. There was an known issue on SQL Server Native Client.
https://support.microsoft.com/en-us/kb/910229

Note2: If another SQL instance co-exists on the Backup Exec server, the following step is recommended.

a) Stop all applications and all SQL instances
b) Uninstall all version of SQL Server Native Client
c) Run the Backup Exec upgrade process again
d) Install required version of SQL Server Native Client if co-existing application require another version

SQL Server Native Client is already installed on the Backup Exec server.