Warning failed while updating the boot sectors for disk1 partition1

Suppose we have a computer with BIOS (not-UEFI firmware), which hard disk using a new GPT partition table.

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This trick can be performed with the following (even x86) Windows versions: You also need to understand that every time you turn on / reboot your device, your USB flash drive with the MBR table and the bootloader on it must be plugged into the computer, otherwise Windows will simply not boot.

According to the available information, some models of older computers with BIOS cannot work with GPT drives at all, such disks are simply not recognized during CMOS.

In the Volumes tab, you can see that the type of the partition table is GPT (Partition style – GUID Partition Table).

This method of Windows Boot Manager transfer to a separate USB flash drive allows to use all GPT advantages and make use of the whole size of your hard disk (over 2.2 TB) in BIOS-based systems (without UEFI).

Restart the computer and make sure that the BIOS can not boot from the hard disk with the GPT table. You can make sure your Windows is located on the GPT drive.

Open Disk Manager (diskmgmt.msc) and select system disk properties.

Then burn and enter windows setup through normal BIOS. Find the drive letter of the 2 NTFS volumes created above, say G and H. My question is, will this make the windows install a UEFI install or a legacy install on a GPT disk (Assuming there’s more to a UEFI Windows install than just the partition type? Anything I need to do during install to make it a UEFI install (after fixing the boot loader)?

After reaching the point where you have to select “Install Windows” or “repair windows”, choose the second option. If your machine is suspected to be UEFI capable, then I recommend you test it out with a GPT drive and windows.

Also, it is possible to convert your disk into hybrid MBR mode (hybrid mbr) with the Linux tool Thus, if your PC is BIOS-based and you need to have a disk containing a GPT partition table, the easiest way is to add another MBR hard disk (standard or SSD), install Windows on it and then boot from this disk. To do it, we will need a small USB flash drive or an SD card (64 MB at least) with MBR markup, on which small Windows Boot Manager (bootmgr) is placed.

This bootable USB flash drive provides initial boot and transfer control to the bootloader of the main system located on the GPT volume. ) Windows version in BIOS-based systems (without EFI) is supported.

In this configuration, the BIOS starts booting from the installed SYSLINUX, which loads the UEFI emulator (DUET).

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