Dig up your old Win95 boot floppy and use the FDisk command. Erase everything on the hard drive and start from scratch.
These days, you're lucky if a floppy disk lasts 6 months.
I'd be absolutely shocked if a floppy from the mid-1990's still worked.
Recently I went through some of my old floppies [many of them commercially released] from roughly the 1996-1998 timeframe, and none of them were readable.
If you want to make a bootable floppy nowadays, then you'd probably need to investigate something like FreeDOS.