What I've Tried..
OEM Windows XP Pro SP2
First off I Closed all programs in taskmanager, including killing
Antivirus/Spyware
Protection.
I've tried these two Installers...
Windows Autoupdate of Windows Installer 3.1 - Fails 0x80070005
Windows Installer 3.1 Redis Pack - Access is denied
After some reading I've Applied the KB885894 Patch, Still nothing.
I also checked the [Windows update] Key in Registry is also correct for
Admin/System. The C:\wutemp has full permission, and the temp folder for
install is full permissions. Read up and also cleared out
C:\windows\SoftwareDistribution\Download folder. Nothing works Always
the same ERROR. Here part of the log File that I'm sure one of you will ask
for...
53.344: Copied file: C:\WINDOWS\system32\msi.dll
153.391: Copied file: C:\WINDOWS\system32\msiexec.exe
153.438: Copied file: C:\WINDOWS\system32\msihnd.dll
153.516: Copied file: C:\WINDOWS\system32\msimsg.dll
153.578: Copied file: C:\WINDOWS\system32\msisip.dll
153.625: Copied file: C:\WINDOWS\system32\DllCache\msi.dll
153.641: Copied file: C:\WINDOWS\system32\DllCache\msiexec.exe
153.641: Copied file: C:\WINDOWS\system32\DllCache\msihnd.dll
153.657: Copied file: C:\WINDOWS\system32\DllCache\msimsg.dll
153.672: Copied file: C:\WINDOWS\system32\DllCache\msisip.dll
153.672: DoInstallation: Installing assemblies with source root path:
c:\213d6ac0a24725dc83d5\
153.672: Num Ticks for Copying files : 5312
153.688: DoRegistryUpdates:UpdSpInstallFromInfSection Failed for
MSI.Reg.Install: 0x5
153.688: DoInstallation

oRegistryUpdates failed
153.719: Access is denied.
157.532: Message displayed to the user: Access is denied.
157.532: User Input: OK
157.532: KB893803v2 installation did not complete.
The amount of problems I've had trying to install Windows Installer 3.1,
and many others people on the net with this same problems should be
marked as BUG... I would just say forget, but I have a application that
requires it to be installed. Please Help!
Thanks
Ken