Help please, Ok my pc is a windows me secondhand, i have no windows me cd only a floppy start up disc that came with the pc..sorry i didnt know they needed anything else..(yes very thick i am) and i have the following fault...when i try to boot it says..

verying DMI pool data ..................
Boot from atapi Cd -rom..failure
Disk boot failure insert system disk and press enter

On the odd occasion it did boot after i restarted it but now it will not do a thing..
I know nothing about computers so any info or help please please very simple terms thanks please please help thanks in advance
Caz