Intel does have a Windows 8 driver available
for Intel HD Graphics on a Pentium processor. The link I posted will bring you directly to it. (You can find it by browsing the Intel Download Center under the Graphics Family, Desktop Product Line, and Intel Pentium Processors with Intel HD Graphics as the Product Name).
I have the same problem than vaakash, and the link you posted don't get to the download of the driver but to the driver update utility of intel which produce the message that vaakash posted. Anyone know where it is possible to download the driver?