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Fix Error: We Couldn't Create a New Partition or Locate an Existing One

Posted on Jan 22, 2018 by Daisy to Partition Master

Summary:
Try either the Diskpart command or third-party disk & partition software to fix error We could not create a new partition or locate an existing one when installing Windows 10/8.1/8/7 operating system.

"We couldn't create a new partition or locate an existing one. For more information, see the Setup log files".

we couldn't create a new partition or locate an existing one error

Such an error would probably occur when people try to clean install the second OS using the bootable USB drive, to dual boot Windows 10 with Windows 7 or Windows 8. By choosing custom install and selecting the drive where the OS supposed to install, Windows says it couldn't create a new partition or locate an existing one.

To fix "We couldn't create a new partition or locate an existing one" trouble, give the following solutions a try:

Solution 1. Disconnect any peripherals with PC/Laptop

When you encountered this error message, it's probably because there are some peripherals connected, such as an external HDD, SSD, USB thumb drive/flash drive or an SD card. Just remove and disconnect all external storage drive from the USB port. If you're using USB drive containing setup files to install OS, reconnect only the bootable USB drive and start again.

Solution 2. Run Diskpart

Sometimes you need to take further steps to fix "we couldn't create a new partition or locate an existing one" error. Generally, the partition that holds Windows setup files and boot files should be set as primary, which requires the help of Dskpart in Windows. About how to start and run diskpart to fix the issue, please follow the guide carefully.

1. Start Windows 10/8.1/8/7/XP/Vista 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 then 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.

Solution 3. Make partition active

Repeat the steps (1-4) above to open diskpart firstly. Run diskpart commands we taught as below, and try to set the partition where you want to install Windows OS as active.

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 system and enter select partition 1. Remember to replace 1 with a number that matches your partition.

5. Enter active.

fix we couldn't create a new partition or locate an exising one using diskpart

6. Type exit and press Enter to exit the Command Prompt.

Important notice:

For ordinary users, it's strongly advised not using diskpart to troubleshoot the error. Diskpart is somewhat complex to operate, users with little technical background should not attempt to apply it here. Instead, turn to diskpart alternative - a third-party disk & partition manager software, which supports to convert simple/logic volume to the primary partition and set the desired partition active.

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 Windows 10 is supported

It's simple & powerful in solving "we couldn't create a new partition or locate an existing one" error by setting desired partition primary & active. Just download and launch EaseUS partition manager software. On the disk map, right-click the desired partition and choose "set active". The software will automatically finish the setting and create an active partition for you.

fix we couldn't create a new partition error with EaseUS Partition Master