your specs advise W95, yet you report a W98 problem, both of which suggest you have an old pc.
The error message means what it says. It is not 'seeing/finding ' an os to load.
This could be caused by the cmos battery failing, and then some of the bios parameters will reset to default. Wrong date and/or time are an indication of this.
When the hdd params reset, the hdd then cannot be read until they are corrected.
Have you tried booting to dos off a floppy?
Please advise back on progress.
Good Luck - Keep us posted.