I acquired an old acer desktop with Win 95 and I want to erase the hard drive completely to then re-install Win95 and to install FreeBSD. However the C drive is mounted to H and I need to unmount C. The MSDOS version is 4.0 and I’m not familiar with 4.0 and I have no boot disks for 4.0. I cannot reformat or delete partitions until I unmount the C drive from the H drive. Is there another way to totally erase the hard? Or does anyone know where I could download the contents for an MSDOS 4.0 boot disk? Thanks for any help.