DirectX Diagnostic Tool..

When I type "dxdiag" in the run box in the start menu, the tool loads half way and then a notice appears saying that DirectX has to close. When I go back to run DXDT again I get a message when it is in the middle of loading asking me if I want to bypass DirectShow, and that there was an issue with DirectShow last time I loaded DXDT. Does anyone know why this is happening, what it means, or how to fix it? Any helpful response would be appreciated greatly. :)

Specifications:

-Windows Vista Home Premium (never used to have this problem with XP)

-Nvidia 8800GTX - Driver Date = 3/2/2007 Driver Version = 7.15.11.141

Also, I am not sure if this problem is causing or at all related to the Steam games issue I am currently having when I start my Steam games and the main menu goes black...

What version of DirectX do you have? If it isn't the latest try downloading it. That's what I would do if it happened to me. I'm no computer guru but ya know.

What version of DirectX do you have? If it isn't the latest try downloading it. That's what I would do if it happened to me. I'm no computer guru but ya know.
But try a seach for Dxdiag.exe.If it appears dbl click it there.
But 9.0c has an update that might repair it.
But a search at www.Microsoft.com will quickly find the newest download.
Not Windows update.
It also might be a seperate install on your Vista CD.
You absolutely need this system device,latest version.

Go to microsoft.com and download the latest DX.

I have DirectX 10, that's what it says on the VERSION column.

I have DirectX 10, that's what it says on the VERSION column.

I would say it's a bug in the system. See if any other Windows Vista Home Premium users have that problem as well.