What version of Windows Tony? If it is Win95 or Win98A it does not have built in USB support, even if the motherboard does (which is why BIOS works). Free upgrade for Win98 on Microsoft site. For Win95 you need the manufacturers driver from their site.
Either way you need to connect a PS2 keyboard/mouse first or use a USB to PS2 adaptor.
If it is Win98SE there are several problems it could be:
<a href="http://support.microsoft.com/default.aspx?scid=kb;EN-GB;q241134" target="_blank">Microsoft</a>