Thanks and sorry for the delay - Dell offers no option to back up BIOS prior to flashing an update. Once you update your BIOS, you will not be able to reverse those changes. This applies to any Dell System. Also note that updating BIOS is not recommended unless there system is posing serious BIOS borne issues as if anything should go wrong, you may be left with no other option but to either have the BIOS chip desoldered from the mobo to be reflashed or the replacement of the motherboard as whole.