Guest JR Posted December 19, 2007 Posted December 19, 2007 I have a w2k machine, up to date, with both external usb devices, memory sticks etc. as well as an internal card reader using 2 USB internal ports. Works fine most of the time and WIN2k allocates 2 drive letters (left and right slot) Occasionally this would not be seen by the system. Now it is permanent! Win2k shows the two drive letters, but device manager show and "unknown" usb device. I have set variable so I can see uninstalled devices etc. and have removed all disk drives not in use and also all old USB devices. Only change is that W2k no longer shows drive letters. Uninstalling unknown device then searching for new devices brings up "Found unknown device" and "searching for drivers". This then falls over every time with error message "An error occurred during the installation of the device. The installation failed because a function driver was not specified for this device occurrence " Not a registry entry to best of knowledge as tried a very early backup. Not a USB conflict as removed all other physical devices to check. PLEASE, any clues. Nothing found on knowledge base. BUT have had a similar problem before with cd/dvd drives and had to remove an atapi registry entry to get drives back. Thanks for any help, John Richards Somerset
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