Updating boot through cd
If you boot from USB, boot loader and operating systems will use the files on USB.
If you boot from the LAN, the boot loader and operating systems will download the necessary files from the LAN.
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Since the early versions of AIO Boot, this tool has supported booting from the LAN.
It supports you to do a lot of work such as installing OS, running tools to Ghost, managing partitions, backup and recovery.
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This wiki How teaches you how to update the BIOS software for a Windows computer.
Select the system partition as the active partition in step 2 above.The advantage of network booting is that you will not need to attach boot devices to clients (except cables).