My machine (hand-me-down) came with a USB keyboard and mouse. But Win98 would not recognise them - and you could only do the OS load by using the keyboard (once I swapped it) and still using the USB mouse - it would not recognise it (no matter WHAT the BIOS said!) - so you had to use keyboard to load it - I last did that win WIN3.1 from memory....

So guess which keyboard and mouse is on the shelf and which is plugged in, remembering that I have had to reload Windows several times?... :-)