How to upgrade your system BIOS using FreeDOS: 
It is not often that most of us need to update the BIOS in our host computers.
In fact, most motherboard manufacturers, including Intel, recommend against upgrading BIOS unless there is a specific problem that an upgrade to a specific BIOS level will fix. Most sysadmins also would agree that “if it is not broken, don’t fix it.” Upgrading BIOS just to get to the latest level is counter-productive in terms of the time it takes, but also can cause problems that did not previously exist.
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