Two Win 10 in two part but one drive, want to remove old system part

Hello

I have one SSD with two partitions with Windows 10 installation in each. The first partition was due to the old system (intel) and the new one is for the new system (amd).

Here is my current configuration:

F: old parition
C: new partition



I have already set the C: as the default boot drive from MSCONFIG but F: is still marked as the active, primary, and system partition.

Is there a way to move the active, primary, and system status to my C drive?

You can make the partition active in disk management. Select the partition (as you have in picture above), right click and select "Mark partition as active"

Then type bcdboot c:\windows from administrator command prompt to create system files.

Open Elevated Command Prompt in Windows 10 | Windows 10 Tutorials

F will continue to be a primary partition but that is fine (mbr formatted disks have up to 4 primary partitions). Once you have rebooted and it looks fine you can if you want reformat F or just put other data on it.

You could also (if you wanted) use MiniTool Partition Free to move C and recovery partitions to the left and put F directly before the unallocated space at the end. If you did that you could extend F to make use of this space. Alternatively you could just format this unallocated space for use as another partition.

lx07 said:

You can make the partition active in disk management. Select the partition (as you have in picture above), right click and select "Mark partition as active"

Then type bcdboot c:\windows from administrator command prompt to create system files.

Open Elevated Command Prompt in Windows 10 | Windows 10 Tutorials

F will continue to be a primary partition but that is fine (mbr formatted disks have up to 4 primary partitions). Once you have rebooted and it looks fine you can if you want reformat F or just put other data on it.

You could also (if you wanted) use MiniTool Partition Free to move C and recovery partitions to the left and put F directly before the unallocated space at the end. If you did that you could extend F to make use of this space. Alternatively you could just format this unallocated space for use as another partition.

Hello

Thanks for replying.

I already had minitool wizard installed but cannot set the partition to active / system and I have already done the command bcdboot c:\windows before.

Is it safe to mark the C: to primary partition and then mark as active, since an MBR formatted drive can have 4 as you said?

You can not make c active as its not a primary partition its logical

sinoka56 said:

Is it safe to mark the C: to primary partition and then mark as active, since an MBR formatted drive can have 4 as you said

Yes - you can convert it to primary with partition wizard (see here) and then set it active. As it is currently a logical partition you don't see the "Make active" on right click . The system files are there - it is just the active flag that defines what will boot and you can't set active on logical partition.

lx07 said:

Yes - you can convert it to primary with partition wizard (see here) and then set it active. As it is currently a logical partition you don't see the "Make active" on right click . The system files are there - it is just the active flag that defines what will boot and you can't set active on logical partition.

I changed the partition to primary and set as active, now it doesn't boot -.-

Encountering missing operating system

sinoka56 said:

I changed the partition to primary and set as active, now it doesn't boot -.-

Encountering missing operating system

The command should have been:
bcdboot C:\Windows /s C:

NavyLCDR said:

The command should have been:
bcdboot C:\Windows /s C:

Not if the C was set active first. Perhaps it wasn't run again?

BCDBoot copies the boot files to either the active partition on the primary hard drive, or the partition specified by the /s option.

BCDBoot creates the BCD store in the same partition.

BCDBoot Command-Line Options | Microsoft Docs

sinoka56 said:

I changed the partition to primary and set as active, now it doesn't boot -.-

Did you fix this yet? You can try the steps in solution 2 here from a command prompts in recovery or booting from external USB:

Fix Operating System Not Found When Booting Windows 10 / 8 | Password Recovery

Code:

bootrec.exe /fixmbr
bootrec.exe /fixboot
bootrec.exe /rebuildbcd

You can do the bcdboot command while the drive is connected to another PC. The Windows partition will get it's own drive letter. For example if it gets F: the command would be:

F:\Windows\System32\bcdboot F:\Windows /s F: /f ALL

Change all the F: above to whatever drive letter the windows partition gets assigned. Do not change the /f, that stands for "firmware" and ALL after it will set it up to boot UEFI and legacy BIOS, although it probably won't boot in UEFI since the Windows partition is NTFS formatted.