I have an aged P200 (I think) laptop (Gateway 2000) which I kept for my children to play a Win 98 game which won't play on anything newer - Babyz, if you're interested. The battery is flat and I only play when connected to the mains. However, on the latest turn on I get the message "No operating system found". Anything I can do about this? The laptop has a floppy drive and cd drive.