Boot-Up Issues

My friend's computer has been pretty messed up for a while to the point where I can't boot Windows. I soon decided it was time to reformat the system but now I am unable to boot from a floppy or the cd rom drive. I've checked the BIOS and ensured that the floppy was set as first and cd as second. Whenever i turn on the computer the message "Invalid system disk, replace disk and press any key to restart" and the screen seems to be stuck there. I'm running out of ideas and options since I can't even use the Windows Emergency Boot disk. Any help would be greatly appreciated. Thank you.

 

What version of windows are you trying to reload?