BUG #15050: Initdb.exe failing to create DB

The following bug has been logged on the website:

Bug reference: 15050
Logged by: dheeraj chhabra
Email address: dheeru(dot)chhabra(at)gmail(dot)com
PostgreSQL version: 9.6.3
Operating system: Windows 2012 R2
Description:

Following is the output of initDB.exe:

Mon Feb 05 16:06:13 AEDT 2018=========== initdb.exe =============
initdb: could not start process for command ""D:\BMC
Software\TrueSightPServer\truesightpserver\modules\pgsql\bin\initdb.exe" -U
SVC_BMCMON -A trust -E utf8 -D "D:\BMC
Software\TrueSightPServer\truesightpserver\data\pgsql" -X "D:\BMC
Software\TrueSightPServer\truesightpserver\data\pgsql_txnlog" --pwfile
"D:\BMC
Software\TrueSightPServer\truesightpserver\tmp\DBdata7317520133955961463ks"":
error code 1260
initdb: could not re-execute with restricted token: error code 3
The files belonging to this database system will be owned by user
"admrak".
This user must also own the server process.

The database cluster will be initialized with locale
"English_Australia.1252".
The default text search configuration will be set to "english".

Data page checksums are disabled.

creating directory D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql ... ok
creating directory D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql_txnlog ... ok
creating directory D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql ... ok
creating directory D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql_txnlog ... ok
creating subdirectories ... ok
selecting default max_connections ... 10
selecting default shared_buffers ... 400kB
selecting dynamic shared memory implementation ... windows
creating configuration files ... ok
running bootstrap script ... Execution of PostgreSQL by a user with
administrative permissions is not
permitted.
The server must be started under an unprivileged user ID to prevent
possible system security compromises. See the documentation for
more information on how to properly start the server.
child process exited with exit code 1
initdb: removing data directory "D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql"
initdb: removing transaction log directory "D:/BMC
Software/TrueSightPServer/truesightpserver/data/pgsql_txnlog"

Please suggest the resolution ASAP.

-Dheeraj