DEVICE FAULT (USB Device)
Open the Device Manager -
START > SETTINGS > CONTROL PANEL > SYSTEM > DEVICE MANAGER
In Device Manager -
1. Click on the "+" sign next to 'Universal Serial Bus Controllers'.
2. Click on each entry under that heading (to highlight it), then delete the entry by clicking "Remove".
There will be several entries to delete. You will have to click on the "+" sign to re-open the section after deleting each one.
If there are any entries with a yellow exclamation mark (which indicates a fault) or a yellow question mark (which indicates an unrecognised device) against them, remove those entries also.
Then reboot. Windows will automatically re-install the correct drivers in the course of the reboot. If you are asked to point the install wizard to the location of the proper driver file, it is probably in one of these folders -
C:\WINDOWS
C:\WINDOWS\INF
C:\WINDOWS\SYSTEM
C:\WINDOWS\IOSUBSYS
C:\WINDOWS\SYSTEM32\DRIVERS
Alternatively, this type of fault can be caused by a conflict with a driver for a device that's not in use. Such drivers only show up in Safe Mode, which shows all installed drivers (only those for the devices currently attached to the system are shown while in normal mode).
So if the solution above doesn't cure the fault, reboot into SAFE mode (press F5 or F8 on startup). Then open the Device Manager again, and (using the same procedure as explained above) delete all "ghost" entries seen there, i.e. those entries that ONLY show up in Safe Mode.
My tip here is that if you find any USB "ghost" entries, delete ALL of the USB devices listed in Device Manager (even those which are not faulty), while in Safe Mode, to give Windows the best chance of doing a clean reinstall of the device.
Then shutdown the computer, and unplug all USB devices - this increases the chances of success. Then reboot again, into normal mode. Windows will automatically re-install the correct USB controller drivers in the course of the reboot.
Do NOT plug the problem USB device into the computer's USB port until Windows has finished loading, following this restart. Also, remember to switch ON that USB device's power AFTER connecting the USB cable to *both* the USB device and the computer.
USB DEVICE IN WINDOWS 98
If the above suggestions don't solve the problem -
Windows ME has built-in drivers for USB 1.1, but Windows 98 does not. To use any type of USB device with Windows 98 you must obtain driver files from an external source (i.e. not from the Windows installation CD).
1. You can try reinstalling the original USB drivers from the original third party (i.e. non-Microsoft) installation floppy disks or CDs that came with the computer.
2. Or you can try using the generic mass storage drivers for Windows 98 that are available on the internet; but there is no guarantee that they will work with your device.
Also, you will need a different type of generic driver depending on which version of Windows 98 you have. One type will ONLY work with Windows 98 Second Edition. The other type will only work with the original release of Windows 98 (the so-called "first edition", a.k.a. "Windows 98 Gold"). Look here:
http://www.technical-assistance.co.uk/kb/usbmsd98.php
3. Or you might find a compatible Windows 98 driver at
http://www.mdgx.com/web.htm#NUS
MSConfig (the 'System Configuration Utility') cannot help. A device driver fault can only be cured by using the Device Manager.
Going through a diagnostic start-up with MSConfig, disabling one start-up option at a time, and then rebooting, will not do anything to cure errors shown by Device Manager. A diagnostic start-up only enables you to detect problems in the configuration of real mode (i.e. MS-DOS) device drivers (i.e. those loaded by your AUTOEXEC.BAT or CONFIG.SYS files), not protected mode Windows devices loaded by your Windows Registry files.