im havin the same prob as well.. im upgradin from directx 9.0b to 9.0c.. but during installation.. it dun show the complete process.. but juz a quick view of the installation and the its done, but the version din chg at all under the dxdiag... wats the prob occurs? and does it involve the use of win xp sp2? i tried many times but still the same thing happen.. need solutions..