Hi Dina,
Welcome to forum,
The file with the extension. Exe must be decompressed.
So we must be Windows mode, in your usual session.
You must click on the exe file. Using the mouse.
It will unzip to a folder.
Remember where it is.
Go there, copy the contents of the file in the floppy disk.
Check that the same content is there. Compare the file and floppy disk well.
If everything is the same. You can restart and follow the procedure for Flashing the BIOS.
Suffice to say ( Simply indicate) at the right time, where the bios file is decompressed.
If you need further explanation, come back here before anything.