-> Update your bios and disable all unused ports. (Serial or Parallel, floppy -> etc...) Put PCI as initial display device or similar.
The BIOS is the latest version. I've disabled every onboard interface except for the USB ports and LAN, but still get the Code 10 and 12 errors when the PCI adaptor comes first (but no errors at all when it comes second).
-> Then see about getting latest chipset driver from manufacturer's website.
There's nothing on the Asus web site for any OS after Windows XP. I got the LAN driver working first, using an old version of Catalyst. After that all of the rest of drivers installed themselves from Windows Update and the the LAN driver updated itself, so they should all be as current as possible.
-> Then install latest ATI driver from website. If you can't do this part, let me know after you did the other stuff.
I did a complete driver uninstall, rebooted and then reinstalled the latest Catalyst Windows 7 32-bit drivers from ATI. The log is below.
Catalyst™ Install Manager
Hardware information NameRADEON 9000/9100 IGP SeriesManufacturerATI Technologies IncDevice ID0x5834Vendor ID0x1002Class Code0x030000Revision ID0x00Subsystem ID0x8107Subsystem vendor ID0x1043Other hardware
Existing packages Microsoft Visual C++ 2005 SP1 RedistributablePackages for install
ATI Catalyst Install Manager Final Status:SuccessVersion of Item:3.0.745.0Size:20 Mbytes Other detected devices
ManufacturerATI Technologies IncDevice ID0x5833Vendor ID0x1002Class Code0x060000Revision ID0x02Subsystem ID0x8107Subsystem vendor ID0x1043ManufacturerATI Technologies IncDevice ID0x5838Vendor ID0x1002Class Code0x060400Revision ID0x00Subsystem ID0x5838Subsystem vendor ID0x1002ATI Integrated SMBus Support ManufacturerATI Technologies IncDevice ID0x4353Vendor ID0x1002Class Code0x0c0500Revision ID0x1aSubsystem ID0x8108Subsystem vendor ID0x1043ManufacturerATI Technologies IncDevice ID0x4349Vendor ID0x1002Class Code0x01018aRevision ID0x00Subsystem ID0x8108Subsystem vendor ID0x1043ManufacturerATI Technologies IncDevice ID0x4342Vendor ID0x1002Class Code0x060401Revision ID0x00Subsystem ID0x0000Subsystem vendor ID0x0000 Error messages
The system is still behaving exactly as before - the HD2400 is driving the Windows display but shows up in Device Manager as a Standard VGA Graphics Adaptor with a Code 10 error.