I am having the same problem - how do I get the hotfix that is mentioned?
--
barb


"A L" wrote:
[color=blue]
> Thanks for the help. I did try uninstalling all the various USB devices in
> the Device Manager multiple times. No luck. I ended up installing a spare
> PCI USB 2 card I had and am able to connect everything through there instead
> of the ports on my motherboard. Looks like MS has a fix for this problem in
> XP:
>
> [url]http://support.microsoft.com/kb/920875[/url]
>
> Hopefully they'll release a hotfix for Vista too. Al
>
> ps- I have XP installed on another partition, the motherboard USB jacks work
> fine there, so it's definitely have software issue I'm having.
>
> "mikeyhsd" wrote:
>[color=green]
> > have you tried uninstalling the ROOT HUBS, shutting down for 3-5 minutes,
> > rebooting and allowing the system to find and reinstall the USB devices.
> >
> >
> >
> > [email]mikeyhsd@sport.rr.com[/email]
> >
> >
> >
> > "A L" <AL@discussions.microsoft.com> wrote in message news:97982AB4-57B3-4165-93D3-84FFE87F6261@microsoft.com...
> > Hello-
> >
> > All of a sudden a few days ago, many of my USB devices started showing as
> > Unknown Devices in the Device Manager. I've read that this sometimes happens
> > in WinXP too- but no post that I found about the problem proposed a solution
> > (for Vista or XP.) If I disable the "Standard Enhanced PC to USB Host
> > Controller", the system then locates drivers for all of the devices, but runs
> > them in USB 1.1 (slow!) mode.
> >
> > I'm seeing this for flash storage devices (thumb drives, flash card readers,
> > ipod), logitech quickcam 5000, plantronics USB headset etc. Oddly, my MS
> > Intellimouse Explorer 3.0 and APC UPS work fine!
> >
> > Anyone know what to do?
> > I have a ton of USB devices defined in the registry under
> > HKEY_LOCAL_MACHINE\SYSTEM\ControlSet002\Enum\USB\ , but regedit does not
> > allow me to remove any of these.
> >
> > I also unfortunately don't have a System Restore Point to back when my USB
> > devices were working.
> >
> > If anyone has ideas for something to try, please post! Thanks, Al[/color][/color]