SQL Server System Configuration Checker - Installation Error

hello,

I downloaded SQL Server 2005 from Microsoft's website and tried to install.

First I downloaded and installed filename "dotnetfx.exe" according to the install guide. Installed without any issues.

Then i tried to install filename: "SQLEXPR.exe"- the main SQL Server software- which I also downloaded from Microsoft. I get the error below and here is how i got it.

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ERROR:
The SQL Server system configuration Checker cannot be executed due to WMI configuration on the machine YOUR-07NFK16HDF Error:2147749896(0x80041008)
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I clicked on the executable file SQLEXPR.exe, then,
after extracting the file,

after the end user license agreement...

the next screen says "installing prerequisites Microsoft SQL server 2005 setup support files, the required components were installed successfully"

then i hit "next", then I see the screen with message (below:

"system configuration check....SQL server setup is scannong your computers configuration".
During this process(system configuration check), this is when I get the error ERROR- above. The pop-up error screen has a help icon.

clicking on help gives me the info below and says i must send it across the internet

Link ID = 20476
Product Name = Microsoft SQL server
Product version = 9.00.2047.00
message source = setup.rll
messageID = 70342

the resulting information says that there is no such information about message source in the knowledge database.

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pls what is the problem. Is it with the downloaded file(I got it from Microsoft's SQL Server home page)...and pls what is the WMI configuration on my machine?

Im using a Toshiba Satellite Pro Laptop, WIn XP with SP2.

thanks
El_N