USB Controller Problem

[Guest]

I have a PC with 6 USB2 ports on the motherboard and a powered USB2 Hub
connected to one of the ports. Various USB devices are connected to either
the remaining motherboard ports or the hub. USB support is enabled in BIOS.
Device Manager shows the following USB Controllers:
- Generic USB Hub
- Intel(R) 82801DB/DBM USB 2.0 Enhanced Controller - 24CD (Disabled)
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7
- USB Printing Support
- USB Root HUb
- USB Root Hub
- USB Root Hub
The reason the Enhanced Host Controller is disabled is that, when enabled,
the PC will not boot - it appears to stop just before the USB drivers load.
When the controller is disabled the PC boots normally but if I connect a USB2
device I get a message that the device will function at a reduced speed and I
should add a HI-Speed USB host controller to obtain maximum performance. I
have tried uninstalling the entries and letting Windows XP(SP2) detect the
devices again but I end up with the same entries.Can anyone please suggest
how I can add a HI-Speed controller or get the disabled one to work properly.
Any advice would be appreciated.

 

[CS]

I have a PC with 6 USB2 ports on the motherboard and a powered USB2 Hub
connected to one of the ports. Various USB devices are connected to either
the remaining motherboard ports or the hub. USB support is enabled in BIOS.
Device Manager shows the following USB Controllers:
- Generic USB Hub
- Intel(R) 82801DB/DBM USB 2.0 Enhanced Controller - 24CD (Disabled)
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C2
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C4
- Intel(R) 82801DB/DBM USB Universal Host Controller - 24C7
- USB Printing Support
- USB Root HUb
- USB Root Hub
- USB Root Hub
The reason the Enhanced Host Controller is disabled is that, when enabled,
the PC will not boot - it appears to stop just before the USB drivers load.
When the controller is disabled the PC boots normally but if I connect a USB2
device I get a message that the device will function at a reduced speed and I
should add a HI-Speed USB host controller to obtain maximum performance. I
have tried uninstalling the entries and letting Windows XP(SP2) detect the
devices again but I end up with the same entries.Can anyone please suggest
how I can add a HI-Speed controller or get the disabled one to work properly.
Any advice would be appreciated.

Try removing the powered hub and any other external device and enable
the motherboard Intel USB enhanced controller. If that doesn't work,
see if there is a flash update available for your motherboard BIOS
that addresses the problem. Of course you could always add a PCI to
USB 2.0 enhanced controller card, but since your MB has the built in
Intel controller it shouldn't be necessary.