Problem with KB212-B and Windows 8

Dear Dell, I have just purchased a new Dell keyboard (KB212-B) to add to my home tower PC. My PC is running Windows 8.1 x64 on an AMD Motherboard. The new keyboard was bought to replace an old Dell RT7000 keyboard which is now a bit old and tired. Unfortunately I'm having some problems getting the new keyboard working. When I first plug it in it works fine. Windows automatically installs the necessary drivers when I plug it into the USB port and the keyboard works perfectly. However if I then reboot the PC the keyboard no longer works. It is recognised during the BIOS Boot stage, but as soon as Windows 8.1 boots it stops working. Device Manager shows it as an Unknown USB device (Invalid Device Descriptor) and reports that "Windows has stopped the device because it reported problems (Code 43). The USB device returned an invalid USB device descriptor." If I uninstall the device in Device Manager, remove the USB cable and plug it back in. The system the recognises the keyboard properly, installs it as an "HID Keyboard device" and it all works fine till the next reboot. Can you advise how to resolve this issue. I have tried multiple different USB ports with the same result.