unable to install wsus

When I tried to install wsus. I got an error and unable to continue.
part of the log file as follow:

2005-08-02 08:12:00 Error MWUSSetup InstallMSUS failed (Error 0x80070641: The Windows Installer service could not be accessed. Contact your support personnel to verify that the Windows Installer service is properly registered.)
2005-08-02 08:12:00 Error MWUSSetup MWUS installation failed (Error 0x80070641: The Windows Installer service could not be accessed. Contact your support personnel to verify that the Windows Installer service is properly registered.)
2005-08-02 08:12:00 Error MWUSSetup PerformInstall failed (Error 0x80070641: The Windows Installer service could not be accessed. Contact your support personnel to verify that the Windows Installer service is properly registered.)
2005-08-02 08:12:00 Success MWUSSetup Rolling back Installation

I got all the prerequest installed.
any one has any idea.
thanks

[961 byte] By [mscitizen] at [2007-12-16]
# 1
Try going to start then run

type msiexec /regserver

click OK

Cosmo69 at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...
# 2
Thanks for teh info... That was perfect. Ran the Upgrade perfect after running that.
Thanks again Cosmo!!
N.I.C. at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...
# 3

I was unable to install 3 updates, Outlook junk filter, .NET, and Office 23ksp2.

Your recommended "msiexec /regserver " worked.

Thanks,

DanB. at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...
# 4

Hi Cosmo69

As per above message.

I have gone into: Run and type in: msiexec /regserver, and a message comes up saying, msiexec, is incorrect, please try again.

Is this correct?

Hope you can help.

Thanks

James Nightingale

jamesn20_@hotmail.com

JAMESNIGHTINGALE at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...
# 5
Didn't work for me.
DrNorm at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...
# 6
Had the same problem with some office update via Microsoft Update... it worked. Thanks
Zartor at 2007-9-9 > top of Msdn Tech,Windows Forms,ClickOnce and Setup & Deployment Projects...