http://support.microsoft.com/kb/250079/en-us
CAUSE
This is caused by the system BIOS trying to report its ISA bus type more than once during the boot process. There is no adverse affect to the system or its performance.
RESOLUTION
Contact your motherboard manufacturer for a BIOS update.
If I read right you are using 98? you might be better trying to get hold of a 98SE or ME upgrade SE was a big improvement on plain old 98