BUG #15774: Postgresql installation error with BIGSql

The following bug has been logged on the website:

Bug reference: 15774
Logged by: Avanthi Gowni
Email address: avanthika(dot)gowni(at)hotmail(dot)com
PostgreSQL version: 9.6.9
Operating system: Windows 7
Description:

I'm facing issue installing the PostGreSql 9.6 with the below error.
I have admin access. Not sure what the configuration problems is.
Below is my log information.

Log started 04/19/2019 at 14:31:49
Preferred installation mode : win32
Trying to init installer in mode win32
Mode win32 successfully initialized
[14:31:52] Initializing PostgreSQL installer
[14:31:52] Windows Version is: Windows 7 (6.1)
[14:31:52] Operating System Language is: en
[14:31:52] Current build_identifier is: 9.6.9-1
[14:31:52] System PATH:
C:\Program Files (x86)\Common
Files\Oracle\Java\javapath;C:\IBM115\InformationServer/jdk32\jre\bin;C:\IBM115\InformationServer/jdk32\jre\bin\j9vm;C:\IBM115\InformationServer\ASBNode\lib\cpp;C:\IBM115\InformationServer\ASBNode\apps\proxy\cpp\vc60\MT_dll\bin;C:\Program
Files (x86)\MKS
Toolkit\mksnt;C:\IBM\InformationServer\ASBNode\apps\jre\bin\classic;C:\IBM\InformationServer\ASBNode\lib\cpp;C:\IBM\InformationServer\ASBNode\apps\proxy\cpp\vc60\MT_dll\bin;C:\app\oracle64\product\11.2.0.4\cl\bin;C:\app\oracle32\product\11.2.0.4\cl\bin;C:\Program
Files
(x86)\CA\SharedComponents\PEC\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\Program
Files (x86)\ATI Technologies\ATI.ACE\Core-Static;C:\Program Files
(x86)\WebEx\Productivity Tools;C:\Program Files (x86)\CA\SCM;C:\Program
Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\Microsoft
SQL Server\120\DTS\Binn";C:\Program Files (x86)\Windows Kits\8.1\Windows
Performance Toolkit\;C:\Program Files (x86)\Microsoft
SDKs\TypeScript\1.0\;C:\PROGRA~1\IBM\SQLLIB\BIN;C:\PROGRA~1\IBM\SQLLIB\FUNCTION;C:\PROGRA~1\IBM\SQLLIB\SAMPLES\REPL;C:\Program
Files (x86)\Sennheiser\SoftphoneSDK\;C:\Program Files
(x86)\WebEx\PTools020000000;C:\Program Files\Microsoft SQL Server\Client
SDK\ODBC\110\Tools\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\;C:\Program Files\Microsoft SQL
Server\120\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\120\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL
Server\120\DTS\Binn\;C:\Program Files\AppSense\Application
Manager\Agent\Plugins\EcaRulesEngine\;c:\Program Files (x86)\Microsoft SQL
Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL
Server\100\Tools\Binn\;c:\Program Files\Microsoft SQL
Server\100\DTS\Binn\;C:\Program Files (x86)\Microsoft SQL
Server\110\Tools\Binn\ManagementStudio\;C:\Program Files (x86)\Microsoft SQL
Server\110\Tools\Binn\;C:\Program Files (x86)\Microsoft Visual Studio
11.0\Common7\IDE\PrivateAssemblies\;C:\Program Files (x86)\Microsoft SQL
Server\110\DTS\Binn\
[14:31:52] Initializing pg96 variables
[14:31:52] Download url: https://s3.amazonaws.com/pgcentral
[14:31:52] PostgreSQL Locale to install: DEFAULT
Setting variable windows_net_session_exitcode from
C:\Users\xe397\AppData\Local\Temp\postgresql_xe397/net-session-exit-code.bat

Script exit code: 0

Script output:
0

Script stderr:

[14:31:53] Exit code of "net session" is: 0.
[14:31:53] Orphaned PostgreSQL servicename found. Cleaning up now
[14:31:53] Executing pg96 Pre-install actions
[14:31:58] Validating installdir: C:\PostgreSQL
[14:31:58] Setting pg dir: C:\PostgreSQL\pg96
Setting variable check_pgc-path from
C:\Users\xe397\AppData\Local\Temp\postgresql_xe397/check-path.bat
"C:\PostgreSQL"
Script exit code: 0

Script output:
OK

Script stderr:

[14:32:15] Testing selected data dir: C:\PostgreSQL\data\pg96
[14:32:15] Using pg free port = 5432
[14:32:23] Network connection required for component download
Preparing to Install
Windows security permissions
[14:32:24] Granting permissions to directories
Granting permission to NetworkService for C:\PostgreSQL
Granting permission to Everyone on Logs
Check download connection
Preparing to Install
[14:32:24] Executing postgresql ready to install actions
Check for existing Windows service
Check for existing installation: C:\PostgreSQL
[14:32:24] Checking for PostgreSQL installation in existing directory
C:\PostgreSQL
[14:32:24] Executing pgadmin ready to install actions
Unpacking files
Unpacking files
[14:33:50] Executing pg96 Post-install actions
PGC info
Run PGC info so that pgc install information is saved to installer log
file
Executing C:\PostgreSQL/pgc info
Script exit code: 255

Script output:

Script stderr:
\Windows was unexpected at this time.

Error with configuration or permissions. Please see log file for more
information.
Problem running post-install step. Installation may not complete correctly
Error with configuration or permissions. Please see log file for more
information.
[14:34:02] Running pgAdmin post installation actions
Installing pgAdmin3 ...
Executing C:\PostgreSQL/pgc install pgadmin3
Script exit code: 255

Script output:

Script stderr:
\Windows was unexpected at this time.

Error with configuration or permissions. Please see log file for more
information.
Problem running post-install step. Installation may not complete correctly
Error with configuration or permissions. Please see log file for more
information.
Cleanup
Deleting temp dir: C:\Users\xe397\AppData\Local\Temp\postgresql_xe397
Creating Uninstaller
Creating uninstaller 25%
Creating uninstaller 50%
Creating uninstaller 75%
Creating uninstaller 100%
Uninstaller icon changed
Installation completed
Signed uninstaller
Log finished 04/19/2019 at 14:34:37