The short version: Intel has produced no WDDM 1 (Vista) or WDDM 1.1 (Win7)drivers for the 865G. No Aero Glass.
You may be able to get the XP drivers running. No Aero, but at least you'll get the normal range of settings rather than the limited set for the generic VGA drivers.
My Computer
At a glance
Windows 7 Pro X64 SP1Intel Core I7-3930k16 GB Gskill DDR3-2133eVGA GTX680