Article ID: 2804597 - View products that this article applies to.
Consider the following scenario:
NOTE: This only impacts certain OEM systems that shipped with Windows 7/Windows 8 preinstalled in BIOS Legacy Boot mode.
During Windows 7/Windows 8 setup, certain BCDEdit commands will be executed to configure the new installation. These commands may delete information in the BCD store that is necessary for the UEFI boot manager to load the UEFI firmware menu. Also, Vista, Windows Server 2008, Windows 7, Windows 8 or Windows Server 2008 R2 and Windows Server 2012 may modify the BCD store in a way that prevents the UEFI firmware menu from loading.
Contact your hardware vendor to see if there is a firmware update available to resolve this issue.
LOAD_OPTION_CATEGORY_APP bit of Attributes in Boot#### is deleted by bcdedit.exe /export, then bcdedit.exe /import /clean process. It may also be cleared by installing Windows Vista or later. This can cause the UEFI Boot Manager failure to enter UEFI firmware menu.
(http://go.microsoft.com/fwlink/?LinkId=151500)for other considerations.