Windows Update pushed out a new video driver for the Mobile Intel(R) 4 Series Express Chipset Family. One HP 6730b laptop was updated from 220.127.116.112 to 18.104.22.1681. After the update the color depth is reported as 8-bit even if the setting is 32-bit. This means that Areo effects are disabled.
Downgrading to 22.214.171.1242 did not help.
Is there any way to force the video driver to report 32-bit color depth?