First you’ll have to know the version of current BIOS installed on your system. In the larger right pane, locate BIOS Version/Date. If there is no such thing, then simply download “BIOS Update Utility for Windows”. Connect the USB to the target system, power it on and keeping tapping F12 until you see the Boot menu. In case of laptop, make sure the battery is present in the laptop and the AC adapter is connected with it the whole time.
This page is a reference point and a help section regarding BIOS updates.
In this example, this is a picture of an early AMIBIOS, a type of BIOS manufactured by the AMI.
Another good example of a BIOS manufacturer is Phoenix.
If the Version and Date of BIOS available for download is newer than the one you have currently, then click the download icon next to the BIOS update utility. After extraction, make sure the check is placed for the “Install BIOS Utility now.” option. This works in most cases, where the issue is originated due to a system corruption.
If for some reason you can’t get the above method to work, simply type your laptop’s or desktop’s model under “Search Products”. In the search results below, executable and/or bootable cd (not available for all models) of latest BIOS will be available. Click yes for any all User Account Control warning that appear from now on till you are done with this guide. If the issue is with your computer or a laptop/notebook you should try using the Reimage Plus Software which can scan the repositories and replace corrupt and missing files.