Did son do something else too, perhaps?
You have to get past this to load, so you can remove the motherboard battery for 5 minutes to reset the BIOS.
Then IF you are running:
Download a 98 bootdisk 9free at
www.bootdisk.comRun FDISK and delete the partition, then create a nenw primary partition.
Reboot and format the partition
format c:/u/s
Reload 98