Please try installing this driver:
If you have problems during the installation try the steps mentioned here:
Thanks for the reply. That's the installer/zip I'd been using, but I tried again anyway.
Still not working. If I attempt a manual install via browse, Windows tells me the most up to date driver is installed, regardless of what is installed.. If I attempt 'have disk', Windows tells me there's not a compatible driver in the folder, even though it's the appropriate driver.
Please try the following steps exactly.
1. Login with administrator privileges
2. Open Control Panel
3. Open Device Manager
4. Click on "Display adapters"
5. Double click "Intel HD Graphics"
6. Click on the "Driver" tab
7. Click on "Update Driver" button
8. Click on "Browse my computer for driver software"
9. Click on "Let me pick from a list of device drivers on my computer"
10. Click on "Have Disk" button
11. Click "Browse"
12. Navigate to the folder that you unzipped the Intel HD Graphics driver to
13. Navigate to the Graphics sub-folder
14. Double click the igdlh64.inf or igdlh.inf file <-- depends on if you have 32 or 64 bit OS
15. Click "OK"
16. Click "Next", Driver should now be installing.
17. If successful, click "Close", Reboot.
Note that the "feature" also exists with Windows 10 Preview 8960, yet the configuration utility in 3960 still does not allow above 8bpc (after 18 months).
Because of the recent managerial changes at Microsoft, WHQL might be more stringent, requiring that the full Intel GFX hardware capabilities are offered by the drivers (minimum requirements !), this trend might be setting a precedent, and even if you set Windows 8 compatibility with admin rights, you'll get the message after it wipes the temporary folder, hence the *.zip comes handy.