I have a laptop which is running Win98.
It is a Compaq Pressario 1200.
I left it on and went to get something .... on my return I found that the machine had hung and on trying to restart I was flashed the message "operating system not found".
I checkec the boot sequence and made hard drive primary slave but even after this I get 2 options
1) Boot From Hard Drive
2) Boot From CD Drive