Keep Failing On Trying To Install SQL 2005 Express (I've Read Many Posts But Still No Solution)

I use Widows Vista Business, have uninstalled all previous versions of SQL before installing SQL 2005 Express.

At first, I faced "Receiving WMI configuration error. SQL Server System Configuration cannot be executed due to to WMI configuration on this computer Error:2147749896 (0x80041008)."

Then, I tried this cmd someone posted as:





FIXWMI.CMD
------------------------

@echo on
cd /d c: emp
if not exist %windir%system32wbem goto TryInstall
cd /d %windir%system32wbem
net stop winmgmt
winmgmt /kill
if exist Rep_bak rd Rep_bak /s /q
rename Repository Rep_bak
for %%i in (*.dll) do RegSvr32 -s %%i
for %%i in (*.exe) do call :FixSrv %%i
for %%i in (*.mof,*.mfl) do Mofcomp %%i
net start winmgmt
goto End

:FixSrv
if /I (%1) == (wbemcntl.exe) goto SkipSrv
if /I (%1) == (wbemtest.exe) goto SkipSrv
if /I (%1) == (mofcomp.exe) goto SkipSrv
%1 /RegServer

kipSrv
goto End

:TryInstall
if not exist wmicore.exe goto End
wmicore /s
net start winmgmt
:End

I tried to install SQL2005 Express again, but then it gives:

Error 1603 installing Microsoft SQL Native Client.