USB Keyboard and Mouse options equate to Legacy USB. If
you don't use a USB mouse or keyboard in any type of DOS
style boot or tool then I'd toggle those values to "Disabled".

"mclaren1975" <mclaren1975@discussions.microsoft.com> wrote in message
news:52820647-78EA-482F-A288-C433A252188A@microsoft.com...
> There isn't an option for Legacy USB. I have:
>
> USB 1.1 Controller
> USB 2.0 Controller
> USB Keyboard Support
> USB Mouse Support
>
> If I disable the USB 2.0 controller it boots fine. I think I have a bad
> driver. My MoBo manufacturer (Gigabyte GA-K8U) does not have any updated
> USB
> Controller dirvers available. Just what came with the board. It alsways
> worked before, I don't know why it would stop working now...
>
>
>
> "R. McCarty" wrote:
>
>> Check the BIOS setup for an option called "Legacy USB". If it's
>> enabled XP will attempt to initialize/load drivers prior to the GUI
>> loading. Some devices such as USB external drives seem to stop
>> or prevent XP from booting when Legacy USB is enabled.
>>
>> "sinedthegreat" <sinedthegreat@discussions.microsoft.com> wrote in
>> message
>> news:E3FD47BA-E763-4E7D-A890-183B745B937C@microsoft.com...
>> > Also, does this happen at the beginning of the boot sequence, that is,
>> > before
>> > windows xp starts? If so, this is not a XP problem and reinstalling or
>> > changing anything in XP won't solve the problem.
>> > "Og" wrote:
>> >
>> >> Be sure that your System BIOS is _not_ set to boot from a USB device.
>> >> Steve
>> >>
>> >> "mclaren1975" <mclaren1975@discussions.microsoft.com> wrote in message
>> >> news:5F2F9593-E658-4300-982D-61C48482C146@microsoft.com...
>> >> > JUST did a clean install of XP Pro and I am having the exact same
>> >> > problem
>> >> > that caused me to do the install. If I have ANY USB devices
>> >> > installed,
>> >> > XP
>> >> > won't boot. I have four on board USB boards, 2 more PCI cards with 4
>> >> > each
>> >> > for
>> >> > a total of 12. I can't seem to locate any updated drivers.
>> >> > Uninstalling
>> >> > and
>> >> > re-sinstalling the USB drivers doesn't work.
>> >> >
>> >> > I've tried it with all kind sof combinations of devices and there
>> >> > doesn't
>> >> > seem to be a common thread. MoBo, power supply, memory, HD are all
>> >> > fine.
>> >> > All
>> >> > bought within a year.
>> >> >
>> >> > Any ideas?
>> >>
>> >>
>> >>
>>
>>
>>