<ok so the PC dosn't support 2.0 . Make sure the devices you are using aren't 2.0.
other than that try some of those steps:
if you are using the front usb ports, make sure they are connected right (I've seen them wrong a few times)
make sure the devices work when connected directly into the PC. defective devices do happen.
Make sure all drivers are installed. Some devices will require installing the driver package before plugging in the device. Some devices will also require basic USB files from the Windows CD before the unit will function. The general rule is to always follow installation directions precisely and to have the Windows CD ready when using 98. WinXP has almost every driver made preinstalled so this isn't an issue with XP.
Check the device manager (right click on my computer, properties,) and see if you are having any unknown device driver issues. If so, try to update the unknown device driver from within Device Manager. First try letting Windows search for one. If that fails, go back and choose "Select from a list" and then "Have disk". Browse to the device CD and look for the appropriate Windows folder there. Try browsing to the Windows CD (Win9x folder or i386 folder). Lastly, try updated drivers from the manufacturer's web site.
Try uninstalling the unknown device, unplugging the device and rebooting. Replug when back in Windows.
Be certain that you have the correct drivers! You may have gotten the wrong CD or a CD with drivers for more than one device on it.
Cleaning up in Safe Mode may be necessary. Unplug all USB devices. Reboot the PC. To enter Safe Mode, press the F8 key repeatedly while restarting the PC. Timing is important. Try to press quickly before the Windows logo screen appears. Pressing and holding the CTRL key may work too. Choose Safe Mode and open Device Manager. In Windows 2000 and XP, click View > Show hidden devices. Now locate all USB devices, HID (Human Interface Devices), USB drives and controllers/hubs. Remove all and save the USB Host Controllers for last. When done, restart and replug USB devices one at a time.
If all else fails, just remember that you are entitled to support from the device maker. If you can't get help, do not hesitate to return the device. Some manufacturers only seem to respond to lost business. It's a shame, but it's true. Send them a message - that you won't accept shoddy goods or lackluster support.
(ocultar) Si deseas jugar una partida contra un adversario de nivel similar, puedes definir en tu invitación de nueva partida un rango BKR apropiado a tu interés. En tal caso, nadie con un BKR fuera de dicho rango podrá ver o aceptar la invitación. (Katechka) (mostrar todos los consejos)