Here is everything you need to know to perform the update safely.
If your system drive is encrypted with BitLocker, the BIOS update will trigger a recovery key prompt. Suspend BitLocker temporarily: lenovo thinkcentre m72e bios update
For burning a bootable CD to flash the BIOS outside of Windows. 3. Installation Steps (Windows Method) Here is everything you need to know to
Lenovo typically provides three ways to flash the BIOS for this model: lenovo thinkcentre m72e bios update