"Inaccessible Boot Device" message

I finally got my parts for a DIY computer and assembled it. Everything is brand new except the HD…which has my only copy of Win 2K Pro. on it. Win loads about halfway and I get the blue screen with the message “Inaccessible Boot Device”.
I’m happy as hell the computer runs! But this is a problem I can’t solve. I went to Setup > Boot >Boot Device Priority and it lists my floppy as first and my HD as second, but both of these devices are in parentheses, and a note on the screen says “Devices in parentheses have been disabled in the corresponding type menu”. Help, please?

This thread may help, Quite often running an old Windows install with new hardware (especially a new MOBO) causes big problems.