[header] How to reflash bios [title] Download the bios update executable from the manufacturer website. [step] Read any instructions that come with the executable. Most executables will run fine whether they are loaded onto a floppy or a cd. 
The instructions will let you know if a floppy isn't the recommended method. [substeps] If you don't know the manufacturer of your motherboard, you can use the online bios id manufacturer database to determine the exact make/model.