Windows 10 boots only from old SSD, EasyBCD shows logical drive error

I got a new PC with m2 nvme SSD and I also took my old SSD from the old PC.

Now after installing WIndows on the new SSD it does not boot when I select the new SSD in boot menu, only when I select the old SSD (which is labeled as Windows Boot Manager in UEFI) and select one of the two Windows volumes in Windows menu.

How do I fix it to make it boot just from the new SSD and without Windows selection menu except reinstall?



I tried EasyBCD but I get error

An attempt was made to change the boot partition to a logical drive, which is not allowed. The boot partition must be a primary partition.
Please either select a different drive or convert the selected partition to primary first, then try again.

even though it is a primary partition. Also tried adding 500MB partition on this drive, the same result.

AlexP11223 said:

What supposed to happen after bcdboot? It copied some files but W is still just a normal partition, not marked as active, system etc.

"Active" is only required on a partition on an MBR partitioned disk that is going to be booted in legacy BIOS/CSM mode. If the disk is GPT partitioned, there cannot be an active partition. If the disk is MBR partitioned, the partition can be marked as active, but it is not required to boot in UEFI mode - it is only required for legacy BIOS/CSM.

"System" can mean different things depending on the boot mode and where you are seeing something marked as system. For your computer right at this moment, the partition you created does not need to be marked as System. UEFI will boot from a FAT32 partition that contains boot files whether or not it is of the "EFI System" partition ID type or not.

Now restart your computer by clicking on the restart option of the power menu on the start menu. When the computer restarts go into boot override, which is probably F12 or UEFI setup. You should see the newly created partition listed as a UEFI boot option.

Also, I just noticed you already had a FAT32 partition on the new SSD. It wasn't showing in your first disk management screenshot. You might have an extra partition now that you don't need.

AlexP11223 said:

btw a weird thing is when I select the new SSD in boot override menu I get error saying to insert a bootable device, I wonder why it does not just boot from the next bootable device as specified by boot order.

Boot override is just that: OVERRIDE. It is overriding the boot order set in UEFI. You are telling it specifically where to boot from, and not giving it any other options. You got the "bootable device" error because you did not run the BCDBOOT command to write the boot files to your T:Boot partition.

Now, if the computer will boot from the W: drive partition you created with the diskpart and bcdboot commands, you can convert it to an EFI System partition using diskpart:

diskpart
select volume W:
set id=c12a7328-f81f-11d2-ba4b-00a0c93ec93b override
remove letter=w
exit
exit

Finally - your EFI System partition (whether it is just a FAT32 data partition or an actual EFI System type partition) only really needs to be 100MB, if you want to shrink it.

@AlexP11223 ,

How is your problem doing? Sorry, your thread got knocked off-track a little bit.

NavyLCDR said:

@AlexP11223 ,

How is your problem doing? Sorry, your thread got knocked off-track a little bit.

The same issue when selecting this drive in boot override, the error saying to insert a bootable device.

AlexP11223 said:

The same issue when selecting this drive in boot override, the error saying to insert a bootable device.

In boot override menu, there may be two different entries for the same drive, if CSM mode is enabled. There will be one pointing just the drive itself, like a piece of hardware. Then there should be a second entry for the UEFI boot files present in the FAT32 partition. Make sure you are selecting the UEFI entry.