My 486 had boot sector protection in the BIOS. It would pop up a Y/N confirmation in text mode during boot sector overwrite. This froze the windows 95 setup in

My 486 had boot sector protection in the BIOS. It would pop up a Y/N confirmation in text mode during boot sector overwrite. This froze the windows 95 setup in graphical mode. Although the text prompt appeared for whatever reason the Y/N didn’t work and we could never continue. So was never able to upgrade that machine.