First try just removing ALL the usb devices and let the PC reinstall them.

allanc wrote:

> The USB stick is fine on another computer.
> I have also tried multiple sticks on mine that don't work.
>
> Should I replace the USB driver on my computer?
> If so, how?
>
> On Feb 7, 1:57 pm, Bob I <bire...******.com> wrote:
>
>>Perhaps there was a hardware problem with the monitors USB connections
>>and hub. As to the USB stick?!? Try it on another PC.
>>
>>
>>
>>allanc wrote:
>>
>>>I have a 5 year old desktop (XP PRO sp2) with 6 USB ports in total (4
>>>in back, 2 in front).
>>>The 4 in back are 2.0 but I am not sure of those in front.
>>
>>>I have not had a USB issue until recently when I changed my monitor to
>>>one with 4 built-in USB ports.
>>>I installed the monitor and software according to the directions.
>>>I connected the USB cable to the back of the computer.
>>>However, everytime the cable is connected, I am getting errors such as
>>>'USB device not recognized'.
>>>The device manager also shows unknown devices.
>>>I delete the unknown devices and then try connecting the cable in a
>>>different order such as before/after monitor is powered up, before/
>>>after computer is powered up, etc.
>>>I have also disconnected the power cable to the computer (a suggestion
>>>from a computer help forum).
>>
>>>The USB cable from monitor to computer is now disconnected.
>>>All USB devices that were connected at the time the monitor was
>>>installed function OK (such as keyboard, mouse, printer).
>>>However, a USB stick that I have used many times now displays an error
>>>'USB device not recognized' whenever I connect it.
>>>I have tried updating the USB driver but a message similiar to 'You
>>>are already using the current driver' is displayed.
>>
>>>All suggestions are appreciated.
>>
>>>Thank you in advance.- Hide quoted text -
>>
>>- Show quoted text -
>
>