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Question
Wednesday, October 25, 2017 4:58 AM
To whom it may concern.
ISSUE: After disabling the "Legacy Boot Sources" and enabling "UEFI Boot Sources" the OS doesn't boot and shows error "No option to boot to."
DISCUSSION: We are installing Windows 10 in a Wipe-and-Load deployment method. The HP z230 Tower Workstations are Windows 10 x64 compatible. As part of the enhanced security requirements, we must update the BIOS to latest version and enable Virtualization, TPM, UEFI, and Secure Boot. These settings also include disabling all the legacy options and leaving those of UEFI only. However, after doing all the above, the OS doesn't boot, even with right settings/order in the Boot Options menu. Also, we have noted that one of the good computers, shows the option of Boot Manager within the Boot Options menu. The problematic ones don't and there is no way to make it appear anywhere within BIOS.
Has anybody seen this issue before?
Your thoughts/ideas will be greatly appreciated.
José Rivera
All replies (6)
Wednesday, October 25, 2017 5:12 AM
How to boot a computer in UEFI mode:
Different UEFI firmware implementations support different installation methods. Some EFI platforms support both UEFI and BIOS firmware. On some of those systems, it might be unclear if the default DVD boot option is an EFI or BIOS boot option. On these systems, using the EFI shell command might be required. If you do not specifically start Windows Setup by using the EFI boot entry, the default firmware boot entry for BIOS may be used.If Windows Setup starts in BIOS mode on a combined EFI/BIOS system, the ESP and MSR partitions are not created. After Windows Setup completes, use the Diskpart command to verify that the ESP and MSR partitions were created.
See: Installing Windows to an EFI-Based Computer
Carey Frisch
Wednesday, October 25, 2017 7:17 AM
see this link for additional troubleshooting steps:
https://www.tenforums.com/tutorials/81502-convert-windows-10-legacy-bios-uefi-without-data-loss.html
These are some additional links that may be useful:
https://technet.microsoft.com/en-us/library/hh825112.aspx
http://www.thewindowsclub.com/windows-cannot-be-installed-to-this-disk
https://technet.microsoft.com/en-us/library/dn336946.aspx?f=255&MSPPError=-2147217396
Wednesday, October 25, 2017 7:35 AM
How are you booting systems? Via a USB stick or PXE? Are you changing boot mode on existing systems or prior to initiating wipe and load task sequence? If the latter, does this mean you can't boot into Windows PE?
Cheers,
Anton
Vacuum Breather Blog | Wing Commander Saga | Twitter
Note: Posts are provided "AS IS" without warranty of any kind. If posts are helpful please don't forget to rate them as "Helpful" or as "Answer".
Thursday, October 26, 2017 3:35 AM
We are booting/installing the new image from an external USB hard disk.
We are updating/changing the BIOS first leaving the legacy boot options enabled to install the new image.
After the new image is finished, we can access the OS normally and boot into Safe Mode if we have to. However, is after we disable the Legacy options and enable the UEFI/Secure Boot that the OS doesn't load anymore and shows the "No option to boot to."
Thursday, October 26, 2017 4:37 AM | 1 vote
That would explain your issues - you need to change boot mode prior to installing new OS otherwise partition layout does not match your BIOS settings and correct boot loader can't be found. Any reason why you change the boot mode at a later point?
Cheers,
Anton
Vacuum Breather Blog | Wing Commander Saga | Twitter
Note: Posts are provided "AS IS" without warranty of any kind. If posts are helpful please don't forget to rate them as "Helpful" or as "Answer".
Thursday, October 26, 2017 6:13 AM | 1 vote
You need to understand one critical factor, BIOS requires MBR disk partitioning and UEFI requires GPT partitioning, the two do not mix at all and can't be interchanged. What this means is you either need to make the change from BIOS to UEFI BEFORE installing the OS (and let it partition accordingly) or make the change on your Windows 10 BIOS systems (using utilities from the computer vendor to set the BIOS settings from within the OS) and then run MBR2GPT to convert the disk from MBR to GPT BEFORE rebooting, so the change to the system (changing to UEFI) aligns with the change to the disk partitioning at the same time...
Jack