Installation fails on Windows XP Profession SP 2

Question

I've been trying to install Java Enterprise System 5, but it keeps failing during the "Publishing product information" phase when I use the setup.exe file.
When I use WindowsInstaller-KB893803-x86.exe it gives me the error: "You don't have permission to update Windows XP. Please contact the system administrator." even though I'm logged in as an administrator.
I've turned off the firewall, checked the registry, and look at several installation guides. None of them mention the problem I'm seeing. Any ideas?

Answer 1

I checked that Oracle and Listner Services are Running and SET to Manual.
And the Local User is the Member of ORACLE_DBA Group.
all the files listener.ora, sqlnet.ora, and tnsnames.ora are available in the Same directory.
and the RAM is Now 512 MB. But Still the Same position.
Here are Files.
============================
LISTNER.ORA
============================
SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
(SID_DESC =
(SID_NAME = CLRExtProc)
(ORACLE_HOME = C:\oraclexe\app\oracle\product\10.2.0\server)
(PROGRAM = extproc)
LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(ADDRESS = (PROTOCOL = TCP)(HOST = assist_nadmin.KSM.KAMAL.COM)(PORT = 1521))
DEFAULT_SERVICE_LISTENER = (XE)
==========================================
SQLNET.ORA
==========================================
# This file is actually generated by netca. But if customers choose to
# install "Software Only", this file wont exist and without the native
# authentication, they will not be able to connect to the database on NT.
#SQLNET.AUTHENTICATION_SERVICES = (NTS)
===========================================
TNSNAMES.ORA
========================================
XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = assist_nadmin.KSM.KAMAL.COM)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
EXTPROC_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = PLSExtProc)
(PRESENTATION = RO)
ORACLR_CONNECTION_DATA =
(DESCRIPTION =
(ADDRESS_LIST =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC_FOR_XE))
(CONNECT_DATA =
(SID = CLRExtProc)
(PRESENTATION = RO)
===============================================
Please See the Files Contents for any Information u required.
Thanks for answring.
Kashif