If you boot from your floppy to a DOS prompt and type the command;
and let scandisk do its work, that may solve it long enough for you to backup, or,
you can re-install Windows. It will install "over the top" of your existing installation.
This should leave all your personal files and so on intact. A very high percentage of the time it works as advertised.
On NO ACCOUNT format your drive. That WILL DESTROY ALL DATA on the drive.
A further option if you have an alternative working spare drive, is to take your existing drive out. Reinstall Windows to the new drive. Set your old drive as "Slave" and then recover the work via the new operating system.