New intel beta drivers for Windows 8, for both Sandy and Ivy.
They work also for Win 7 (I tried 32bit version with Core i5 and Win 7 SP1 x86)
They include OpenGL 4 drivers for Ivy.
You can download the HD Graphics driver v2927 (15.28.0.64.2729 (9.17.10.2729)) from this page
64bit:
http://downloadcenter.intel.com/Deta...21180&lang=eng
32bit:
http://downloadcenter.intel.com/Deta...21235&lang=eng