Hi...
I just formated my computer and I installed a fresh copy of DirectX 9.0c found on Microsoft site. But somehow...when I go and check DXDIAG...it keeps saying I have 9.0b.
Why cant I install 9.0c ?
when I run the setup, it goes directly to the end and says its finish after half a second.

Nvm..I found the solution

I HAVE A SOLUTION!!!!

Well it worked for me anyway.

You need both the 9.0b and 9.0c full versions. both around 30Mb each. Unzip both to respective temp folders. then copy and paste the following from 9.0b to 9.0c:

dxsetup
dsetup32.dll
DSETUP.dll

next you need a direct x uninstaller. i used dx eradicator from majorgeeks.com, bu there are plenty around

once done simply run dxsetup in the 9.0c version (which would be the one you copied before right) and it will install using the files from the folder it is in. and there you go you have installed directx 9.0c.