Setup Was Unable to Create a New System Partition

Receiving the “Setup was unable to create a new system partition or locate an existing system partition” while installing Windows? Find the best solution in this post.
Sometimes during the Windows installation process, you receive an error message that reads “Setup was unable to create a new system partition or locate an existing system partition”.
This install failure is caused by the logical drive. As well know, logical drives can also be used to install Windows, but there must be a primary partition to save boot files. Besides, the primary partition should be active partition. Hence, to resolve this issue, you had better convert the logical partition to primary and set it active.
Follow our guide below…

Fix Setup Was Unable to Create a New System Partition

First of all, you need to obtain a bootable partition manager. Here we recommend using MiniTool Partition Wizard to help you. This professional disk partition manager offers the tool to create a bootable partition manager. Besides, you will find it easy to use due to its user-friendly interface and high security.
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Step 1. Follow these guides to create the bootable partition manager and then boot your PC from this media.
How to Build Boot CD/DVD Discs and Boot Flash Drive with Bootable Media Builder?
How to Boot from Burned MiniTool Bootable CD/DVD Discs or USB Flash Drive?
Step 2. When you enter Partition Wizard, select the logical partition that needs conversion and choose “Set Partition as Primary” from the left action panel.
Step 3. Select the target drive again and choose “Set Active” function.
Step 4. Click “Apply” located on the toolbar finally.
Tip: you can also take out the hard drive, connect it to another computer that runs normally, and make the conversion in Windows Disk Management utility. Just delete the logical partition first (you need to delete it for two times, one to make it a free space, another to make it unallocated), then create a primary partition on the unallocated space. Finally, right-click the primary partition and set it as active partition. Reconnect this drive to your PC and reinstall Windows.
By doing these, you have got a primary & active partition to install Windows. Now everything should going well. In fact, there is another situation that you will meet this “setup was unable to create a new system partition” issue, and it is closely related to SATA controller mode. To get the full guide, read How to Fix: Setup was Unable to Create a New System Partition.


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