Setup was unable to create a new system partition or locate an existing system partition? We couldn’t create a new partition or locate an existing one? Now, this post lists 3 reasons as well as solutions to fix this issue effectively and quickly.

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thiết lập was Unable to Create a New System Partition

We couldn’t create a new partition or locate an existing one? Have you ever encountered the following problem? When attempting khổng lồ install any version of Windows, you may go the following message:

Setup was unable to lớn create a new system partition or locate an existing system partition. See the cài đặt log files for more information.

What causes this error?

Why can we not install Windows?

How to lớn solve this problem?

Here, this post will show 3 possible reasons in order. Knowing the exact reason, you can solve the problem with ease. Of course, not all reasons are covered here, và this post just introduces those we have found so far.

Setup was Unable to Create a New System Partition. The Selected Disk is Logical Drive

Reason: If you install Windows on a logical drive, you may receive the warning: “Setup was unable khổng lồ create a new system partition”. (as below)


As we know, logical partitions can also be used to lớn install Windows, but there must be a primary partition to lớn save boot files. In addition, only one primary partition on one hard disk can be phối as active khổng lồ boot operating system at a time.

You could get more information from previous post “Primary partition VS logical drive.”

To deal with the error - we couldn’t create a new partition or locate an existing one, you had better convert the logical partition khổng lồ primary partition & then make it active.

A piece of simple, professional partitioning tool namely MiniTool Partition Wizard is recommended here. This tool offers wizard-based operation, high security và excellent performance. The không lấy phí edition doesn’t provide Bootable truyền thông media Builder. Maybe, you can try the professional edition.

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Detailed steps are here.

Step 1: You need to lớn boot your computer via MiniTool Partition Wizard Bootable Disc lớn get the following window. Here, please choose the first option "Partition Wizard" to lớn enter the main interface of MiniTool Partition Wizard.


Step 2: In this window, select the logical partition & then click “Set Partition as Primary” button on the Change Partition.


Step 3: Click the primary partition & then choose “Set Active” button from left action panel.


Step 4: Click “Apply” and tap “Yes” khổng lồ perform all changes.

Now, you have an active partition as well as primary partition. At this time, you can continue to install Windows.

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Setup was Unable to Create a New System Partition. Mix SATA Controller Mode Incorrectly.

Reason: Sometimes, if you set SATA controller mode incorrectly (with incorrect drive mode, the very disk cannot be used normally), you will also get the error “we couldn’t create a new partition or locate an existing one.”


Changing the mode lớn correct state would be a solution. If the current state is IDE, change it khổng lồ AHCI. If the current mode is AHCI, change it to lớn IDE.

IDE is considered adequate for the average computer user, & is the most compatible with other technology, particularly older devices. However, it lacks tư vấn for new technologies.

AHCI supports some important new features that IDE does not, such as native command queuing & hot-plugging hard drives. It also offers an improvement performance (speed) over IDE.

For more information about these two different modes, please see ACHI vs. IDE.

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Setup was Unable lớn Create a New System Partition. Windows Cannot Identify the Disk.


Reason: Sometimes, when installing Windows from USB drive, external drive, thumb drive, USB stick, instead of using a CD or DVD, you might get this error: “Setup was unable to create a new system partition or locate an existing system partition.”

This error is basically hardware dependent & its appearance varies from PC lớn PC. It depends on your motherboard, your USB interface, the USB stick you are using for installing the OS, and the version of Windows (including Windows Vista, Windows 7, Windows 8, & Windows 10) you are installing.

Broadly the main result of this error is Windows cannot identify the disk on which it should install the system partition.

As we know, during setup, Windows must identify which drive is your primary boot drive in order khổng lồ correctly configure the MBR và bootloader. However, if you are installing Windows with a larger USB drive, Windows setup can sometimes be unable to tell which drive is an external USB drive and which drive is a local disk that Windows should be installed to.

Besides, if you have configured your BIOS lớn boot from the USB drive first always, Windows also cannot reliably determine which one is the boot drive. Also, some USB sticks present themselves to lớn Microsoft Windows as a regular drive instead of identifying as a bootable USB.

Next, let’s see 3 basic yet useful solutions to lớn help lớn get rid of this issue that we couldn’t create a new partition or locate an existing one.

Method 1: Remove unwanted storage devices.

See! If there are so many drives, Windows may not identify which one is the boot drive.

At this time, you can remove all the additional storage devices like SD card, internal/external hard disk, USB drives. Only keep the devices (USB drive and the drive in which you’re installing Windows) that are required for installing the OS.

After doing that, Windows should be able to identify your disk properly for installation of the system partition.

If this method doesn’t work, now let’s start with method two.

Method 2: Eject & re-insert the USB.

To fix the error - couldn’t create a new partition or locate an existing one, you can eject và re-set the USB drive khổng lồ force Windows to lớn re-arrange its ordering of the drives. 

Step 1: When you see the error message “Setup was unable to create a new system partition or locate an existing system partition,” remove your Windows USB drive from the PC (don’t worry, this is safe since no read or write operations are being made from the USB disk).

Step 2: Press the red “X” button in the vị trí cao nhất right corner to lớn exit the installation wizard. Then, you will revive a warning: “To install or upgrade Windows, you must run Windows installation. Are you sure you want lớn cancel Windows installation?” Now, you just need lớn click “Yes” khổng lồ continue.

Step 3: Start the installation from the beginning without inserting USB drive.


Step 4: You’ll see an error about Windows is unable lớn locate thiết lập files, & asks you lớn load a CD/DVD driver for Windows cài đặt to proceed. At this time, click “OK” button to go back to lớn the main setup window again.

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Step 5: Re-insert your USB drive at this point, & then select “Install Now” again.

Now, everything should go as planned since Windows has been forced lớn recognize that the thiết lập USB is a removable drive, & it can identify the correct boot drive to lớn install the Windows boot files.

However, this method only works well on Windows 7, & it may not help you when you install Windows 8, Windows 8.1 or Windows 10. At this time, try using the following method which will be appropriate for any Windows versions.

Want to know the best way?

Method 3: Install Windows directly from hard disk.

If the above methods cannot help lớn move out the error “Setup was unable to create a new system partition,” you can try installing Windows directly from hard disk.

However, this method requires copying all installation files from USB flash drive lớn your local drive, and you need to lớn make this local drive bootable. Detailed steps are shown here.

Step one: Create partition for Windows installation

1: Press Shift + F10 at the dialog where you see the error message in question to lớn bring up a command line console.


2: Type diskpart & press Enter in the command line window.

3: Type list disk and press Enter.

4: Type select disk = N (N is your local disk drive.), and then press Enter.

5: Type clean và press Enter.

6: Type create partition primary & press Enter.

7: Type select partition 1 and press Enter.

8: Type active & press Enter.

9: Type format fs = ntfs quick và press Enter lớn format the partition with NTFS file system type.

10: Type assign and press Enter to lớn assign the partition a drive letter.

11: Type exit & press Enter.

Now you have a bootable drive lượt thích C. Next, you need to lớn transfer files in USB drive lớn it.

Step two: Copy the installation files to the newly created partition

1: xuất hiện diskpart window again, và then navigate khổng lồ USB flash drive. For example, type cd d: and press Enter

2: Type xcopy d: c: /e /h /k và press Enter.

3: Go to boot folder: cd boot.

4: Make you C: drive bootable with the following command:

bootsect /nt60 c:

bootsect /nt60 c: /mbr

5: Eject the USB drive from your computer, & restart.

6: Boot back into Windows setup and select Install Now.

After all operations are done, you are able khổng lồ boot into Windows thiết lập using your local hard disk instead of USB drive and the error “Setup was unable to create a new system partition” should no longer appear.

Although diskpart is workable to create boot partition as well as copy files, this tool requires complex commands. So, users who are unfamiliar with these commands are easy to lớn make mistakes, thus suffering data loss.

In this situation, users can try using a professional, green and free tool namely MiniTool Partition Wizard. This tool not only can help khổng lồ copy all data saved on the USB drive to lớn another one but also can create boot partition, rebuild MBR và more.

For more information about copying drive with ease, you can see “Clone Hard Drive with Best Disk Cloning Software.”

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Now, three possible reasons for this error “we couldn’t create a new partition or locate an existing one” have been listed, và corresponding solutions are also shown. If you are troubled by this error, find the exact reason by referring khổng lồ possible reasons we give và then feel safe lớn try our solutions.

Next, we will show one necessary tool to help you use Windows perfectly.

One Necessary Tool for Windows – MiniTool Partition Wizard

Best partition manager, MiniTool Partition Wizard, can help khổng lồ easily and quickly manage disks as well as partitions. With this tool, we can solve different kinds of problems.

We can copy disk to lớn upgrade the small old hard disk to lớn larger newer one without reinstalling Windows & all other installed programs, và more.We can migrate OS lớn SSD/HD lớn shorten the boot time và enhance the performance of the computer.We can divide our hard drive into several partitions lớn leave a partition for operating system và one to store personal data.

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To know more details about this tool, please click the Play button.

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Did you get the warning: “Setup was unable to lớn create a new system partition or locate an existing system partition, see the thiết đặt log files for more information” during Windows installation? Have you found the exact reason và corresponding solution?

If you have any other good solutions khổng lồ solve the “we couldn’t create a new partition or locate an existing one” issue, please cốt truyện it with us.

If you have any problem with this issue - thiết lập was unable to lớn create a new system partition, please feel không tính tiền to leave it in the below comments. Much appreciated!



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Position: Columnist

It’s going to be 6 years since Bella came lớn MiniTool family. She has been writing tech articles for many years. Her special focuses are clip editing tips, change video format, data recovery, & manage partitions. She loves to lớn travel & likes to lớn try all new things.