Can't enter UEFI firmware setup when in native UEFI mode in Windows 7 and Windows 8
This article provides a solution to an issue where you can't enter UEFI firmware setup when in native UEFI mode.
Applies to: Windows 10 - all editions
Original KB number: 2804597
Consider the following scenario:
- You enter UEFI F/W setup by pressing F1 key during POST.
- Navigate to Startup page and change the UEFI/Legacy Boot setting from Both to UEFI Only.
- Exit UEFI F/W setup using F10 key to save your changes.
- You then boot the system from the Windows 7/Windows 8 installation DVD and do a normal installation.
After Windows 7/Windows 8 setup completes, you're no longer able to enter the UEFI F/W setup option when using the F1 key during POST.
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 are 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's 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. It can cause the UEFI Boot Manager failure to enter UEFI firmware menu.
If you need assistance from Microsoft support, we recommend you collect the information by following the steps mentioned in Gather information by using TSS for deployment-related issues.