Windows 2000 and usb not working ???

[Gav]

Hi
My brother installed windows 2000 alongside windows 98 on a 550mhz time pc.Now when he plugs in the usb speedtouch modem it isnt found.So then he gets the driver up and running for usb and for the modem its fine.But then he resets the machine and he has to do it all over again and so on.Why is it not saving the drivers for the usb?? if anyone can help and speak normal none windows language that would be really great.
Thanks again.
Gav

[Gav]

Its the usb on the board.When i update the drivers in the device manager it works fine,but when i resart the machine it says device can not start in the device manager.

[Gav]

Micro star with american megatrends bios.Ive never updated it.

[Gav]

Everything worked fine on windows 98se. It said can not start device code 10.Anyway in the bios i disabled the usb legacy and it worked.What is this for as im a complete novice to bios.Thanks for all the help.