After installing nVidia driver 173 it runs games like a champ.
nVidia 173's control panel (uninstalled it).
The "latest driver" doesn't activate at all. System Profile showed "unknown".
Additionally removed the soft brightness management because such a thing should be hardwired hardware only.
CTL = Computer Technology Link. KN1 is a boutique gaming model. It has Intel 915pm chipset, nVidia 6600 PCIe video (128 mb 128-bit), 1280x800 widescreen, DDR2 DC RAM, PATA HDD, DVD writer.