I have an HP 400 G1 SFF I'm trying to set up with dual monitors. It has an Intel HD 4600. Device Manager is using the basic MS VGA driver. As a result, even though two monitors are connected, Windows only detects one and mirrors the screen to the second monitor. As far as I know, Intel software is needed to make extending the display work as clicking "Detect" results in nothing happening.
Windows Update installs the driver but it is not present upon reboot. Updating the drivers through Device Manager works, but again, upon reboot, the VGA driver is still present. Manually adding the driver location or choosing a driver from a list of installed drivers works, but upon reboot, VGA driver is still present. Updating through the Intel auto detect utility also completes successfully, but again, the VGA driver is still there on reboot.
The user account in question is an admin account. No group policies are preventing anything to my knowledge. Could not see any BIOS settings pertaining to the Intel display adapter. The only other thing I can think of is that the image deployed to the machine is somehow faulty.
Any other suggestions are welcome.