Full Fix: ‘We couldn’t create a new partition’ error on Windows 10, 8.1, 7

Milan Stanojevic avatar. By: Milan Stanojevic
8 minute read
Fix: Alarm sound not working in Windows 10

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Windows 10 is a great operating system, however, the installation process of Windows 10 isn’t always simple. A number of users reported We couldn’t create a new partition error message while installing Windows 10. This error can prevent you from installing Windows 10, but fortunately, there are several solutions available.

Fix We couldn’t create a new partition error message on Windows 10

We couldn’t create a new partition error can appear while trying to install Windows 10. This error can be quite problematic, and speaking of this error, users reported the following issues:

  • Couldn’t create partition or locate an existing one Windows 10 – Many users reported this error message while trying to install Windows 10. If you encounter this problem, be sure to try some of the solutions from this article.
  • We couldn’t create a new partition error 0x8004240f, 0x80042468 – Sometimes this error message might be followed by error code 0x8004240f or 0x80042468. If you encounter this problem, you might be able to fix it by formatting your hard drive.
  • We couldn’t create a new partition or locate an existing one SSD, RAID – If you encounter this problem while using SSD or RAID, the problem might be additional hard drives on your PC. To fix the problem, disconnect other drivers and make sure that only one drive is connected during the Windows 10 installation.
  • We couldn’t create a new partition Windows setup, Windows 10 USB – Many users reported this problem while trying to install Windows 10 from their USB flash drive. If you encounter this problem, simply disconnect all additional USB drives and check if that solves the issue. Alternatively, you can try using a USB 2.0 flash drive to install Windows.
  • We couldn’t create a new partition unallocated space – This is another problem that can appear while trying to install Windows 10. To fix it, you might have to check your partitions and their configuration.
  • We couldn’t create a new partition BIOS, dual boot, GPT – There are various factors that can cause this issue to appear, and in order to fix the problem, it’s advised to check your BIOS. In addition, you might want to convert your hard drive from MBR to GPT system.

Fix – We couldn’t create a new partition Windows 10 install

Solution 1 – Use diskpart

Before we start this process make sure that you don’t have any SD Cards connected to your PC. We have to warn you that this process will delete all files from your hard drive, so if you’re planning to use it, make sure you create a backup beforehand. To run diskpart, follow these steps:

  1. Start Windows 10 setup using bootable USB or DVD.
  2. If you get We couldn’t create a new partition error message close the setup and click the Repair button.
  3. Choose Advanced tools and then select Command Prompt.
  4. When Command Prompt opens, enter start diskpart.
  5. Now enter list disk. You should see the list of all hard drives connected to your computer.
  6. Find the number that represents your hard drive and enter select disk 0 (we used 0 as an example, so be sure to replace 0 with a number that matches your hard drive).
  7. Enter the following lines and press Enter after each line:
    • disk 0 clean
    • disk 0 create partition primary
    • disk 0 active
    • disk 0 format fs=ntfs quick
    • disk 0 assign
  8. Enter exit in order to close Command Prompt.
  9. Start the installation process again.

As already mentioned, this solution will delete all files on your selected hard drive, so use it on a new computer that doesn’t have any files on it, or only if you have a backup available.


Solution 2 – Make your partition active

In order to fix We couldn’t create a new partition error message while installing Windows 10, it’s advised that you set the desired partition as primary. To do that, you need to start diskpart tool. For more information on how to start diskpart tool, check the previous solution.

Once you start diskpart, you need to do the following:

  1. Enter list disk.
  2. You should see the list of available hard drives. Locate your hard drive and enter select disk 0. We used disk 0 in our example, so be sure to replace 0 with a number that represents your hard drive.
  3. Enter list partition.
  4. List of available partitions will appear. Locate the partition on which you want to install Windows 10 and enter select partition 1. Remember to replace 1 with a number that matches your partition.
  5. Enter active.
    diskpart-active
  6. Type exit and press Enter to exit the Command Prompt.

Start the installation process again and check if the problem is resolved.


Fix – We couldn’t create a new partition Windows 10 USB

Solution 1 – Use a USB 2.0 flash drive

If you’re installing Windows 10 from a USB drive, you might experience this problem if you’re using USB 3.0 flash drive. According to users, it seems that there are problems with USB 3.0 flash drives, and many users advise to use USB 2.0 flash drives when installing Windows 10. Alternatively, you can also create Windows 10 bootable DVD and use it instead of USB flash drive.


Solution 2 – Disconnect any additional USB drives

If you’re planning to install Windows 10 from a USB flash drive you might encounter We couldn’t create a new partition error message if more than one USB drive is connected to your PC. In order to avoid this problem, we strongly advise that you disconnect any additional USB drives and leave only your Windows 10 USB flash drive connected.


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Solution 3 – Reconnect your USB flash drive

To fix We couldn’t create a new partition error message while installing Windows 10, some users are suggesting that you unplug your USB flash drive. When you get the error message, unplug your USB drive and connect it to a different port. Check if you’re able to create a new partition. If the process fails, unplug the USB drive again and connect it to the original USB port. Try to create the partition again.


Solution 4 – Set your hard drive as the first boot device

When installing a new operating system from a USB flash drive, you are probably going to set that device as a first boot device in BIOS. Unfortunately, sometimes it happens that your USB flash drive is mistaken as a hard drive during the Windows 10 installation thus giving you the We couldn’t create a new partition error message. In order to fix this issue, you have to set your hard drive as your first boot device from BIOS.

After you’ve done that, connect your bootable USB flash drive and restart your computer. While you computer boots, you’ll have to press F10, F11 or F12 (it might be a different key depending on your motherboard) and select your USB flash drive as a boot device. After doing that, the installation process should work without any issues. Bear in mind that Boot Menu might not be enabled on your PC by default, so you’ll have to enable it manually from BIOS. For detailed instructions on how to do that, check your motherboard manual.


Solution 5 – Use Rufus or any other tool to create a bootable USB drive

According to users, problems with We couldn’t create a new partition error message might be caused by Media Creation Tool. Users reported that the problem was fixed by using a third-party tool, such as Rufus, instead of Media Creation Tool in order to create bootable USB flash drive.


Solution 6 – Convert the partition to the GPT format

If you’re getting We couldn’t create a new partition error message, you might be able to fix the problem simply by converting your MBR partition to GPT partition. MBR partitions have certain limitations and they can only work with drives that are less than 2TB in size.

GPT doesn’t have any of these limitations, it works better with UEFI, so it’s usually a better choice. We have to mention that converting the drive from MBR to GPT will remove all your files, so be sure to back up important files before proceeding.

To convert a GPT drive, you need to do the following:

  1. Start Command Prompt and enter diskpart.
  2. Now enter list disk. Locate the hard drive that you want to install Windows 10 to.
  3. Now enter select disk X. Replace the X with the number that matches your hard drive. If you have two or more hard drives, it’s crucial that you select the correct drive, so be extra cautious.
  4. Type clean into Command Prompt and press Enter. This command will completely remove all files from your hard drive, so be sure to select the correct hard drive and back up your files.
  5. Now enter convert gpt and run this command.

Diskpart is one of the oldest methods for converting an MBR drive to GPT, even though it’s effective, it will delete all your files. Fortunately, Microsoft introduced two new ways to convert MBR to GPT drive without file loss, MBR2GPT and gptgen.

Both of these are command line tools, and if you want to use them, you need to start Command Prompt before booting to Windows 10 and run one of these commands. We explained in great detail how to use both these commands in our guide on how to convert MBR to GPT disk, and we strongly advise you to check it out for detailed instructions and more solutions.


Solution 7 – Use a third-party tool

If you can’t install Windows 10 due to We couldn’t create a new partition error message, you might be able to fix the problem by using third-party tools. If you’re not familiar with command line tools, you might be able to fix this problem by using  MiniTool Partition Wizard.

MiniTool Partition Wizard is specialized in recovering lost partitions and copying disks. It also offers a friendly user interface so you should be able to easily modify your hard drive and perform the necessary tasks. If you can’t boot to Windows at all, you’ll be pleased to know that you can create a bootable drive and use this tool outside of Windows.


Fix – We couldn’t create a new partition Windows 10 SSD

Solution – Disconnect other hard drives

Many users reported We couldn’t create a new partition error message while trying to install Windows 10 on a SSD. According to users, in order to fix this issue, you’ll have to disconnect all other hard drives and leave only your SSD drive connected. Alternatively, you can try disabling all other hard drives except for your SSD from BIOS. After you’ve disabled or disconnected all other drives, the SSD should be recognized by the installer. Now, all that you have to do is to delete all partitions on your SSD and Windows 10 should install without any problems.

We couldn’t create a new partition error message can prevent you from installing Windows 10, but as you can see, you can easily fix it by following one of our solutions.


Editor’s Note: This post was originally published in April 2016 and has been since completely revamped and updated for freshness, accuracy, and comprehensiveness.


For various PC problems, we recommend this tool.

This software will repair common computer errors, protect you from file loss, malware, hardware failure and optimize your PC for maximum performance. Fix PC issues now in 3 easy steps:

  1. Download this PC Repair Tool rated "Excellent" on TrustPilot.com.
  2. Click “Start Scan” to find Windows issues that could be causing PC problems.
  3. Click “Repair All” to fix all issues with Patented Technologies (requires upgrade).

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