How to Unpartition a Hard Drive in Windows 11/10/8/7

Why need to unpartition hard drive?

If you are planning to sell or recycle your computer or don’t need the partition on the hard drive anymore, you may want to erase all the data on the disk to prevent others to use those data by recovering. In these cases, it’s a good idea to unpartition your hard drive in order to restore it to the factory default.

What is unpartition hard drive? As the name suggests, unpartition hard drive means delete partitions or remove partitions on hard drive. Unpartitioning merges the partition back into the original drive and it will add space back to the original drive which had been partitioned. If you want to add unallocated space to another hard drive for extending, unpartition hard drive can help you too. Through the operation of unpartition hard drive, you can delete all partitions in Windows 11/10/8/7.

How to delete partition Windows 11/10/8/7?

Don’t know how to remove partitions on hard drive? Don’t worry, here provides you two methods to do this operation.

Method 1. Unpartition hard drive with Disk Management

Cause using Disk Management to unpartition hard drive will delete all the partition on it, so all the data will be deleted. If you have important data on the hard drive, you’d better back up data on the hard drive in advance. Then, follow the steps below:

1. Press “Windows” + “R” to open the “Run” dialog box.

2. Then type “diskmgmt.msc” in the search field and press “Enter” to open Disk Management. In the Disk Management window, you will see a list of Disks. Right click the partition you want to delete and click “Delete Volume”. This will delete all data on the partition.

3. After that, you will see the partition as unallocated space. And now you need to allocate the space back to the partitioned drive. Allocating space back to the original drive is essentially absorbing the partition. If the partitioned drive is C, right-click on C and select “Extend Volume”.

4. Now, you should no longer see the partition listed if all was done correctly. And your original drive will no longer be partitioned and all the space will be on that disk.

Tips:If the partition you want to delete is system partition, you will find that the Delete Volume greyed out. That means you cannot use Disk Management to delete system partition.

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Method 2. Unpartition hard drive with third party software

Although Disk Management can help you delete partitions, there are still many restricts. You cannot delete an extended partition unless it is empty and cannot delete the system partition with Disk Management too. Fortunately, you can use a third party software to do this operation.

Compare with other third party software, here I highly recommend AOMEI Partition Assistant-a powerful hard drive unpartitioning software that can not only delete all partitions in Windows 10/8/7 simply, but also erase solid state drive (SSD) security. After unpartitioning the hard drive, the data on the disk will be erased or deleted, and it cannot be restored by any data recovery software. Let’s see the specific steps of unpartitioning hard drive:

If there is any important data on your hard drive, please back up your hard drive at first.

Step 1. Download, install and run AOMEI Partition Assistant. Your partition information will be displayed on the main interface. Right click the disk you want to unpartition and select “Delete All Partitions” to open the related dialog.

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Step 2. In the pop-up window, you can select the delete method. Click “OK” to continue.

* If the disk you select contains a system partition, it will notice you that your computer won’t start the next time after you deleted your system partition. So, if you want to delete system partition, you’d better create bootable media in advance so that you can boot your computer from the bootable media.

“Delete all partitions”:Just delete all partitions on a hard disk. (The data which has been deleted is recoverable if you choose option one in this situation.)

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“Delete all partitions and wipe all data on the hard drive”: Delete all partitions and wipe all data on the hard drive. If you choose this one, even data recovery software may not recover data on these partitions. Therefore, think twice before you decide to do this operation. Or, you can just make a backup of these data before deletion as mentioned above.


  • If you delete a primary partition, the empty you get is called unallocated disk space. If you delete a logical partition by Disk Management, the empty space is called free space. If you want to get unallocated space, you need delete the free space again.

  • If the hard drive you want to unpartition is a solid state drive, you can use the function of SSD Secure Erase to unpartition it. This function will help you reset your SSD to the factory settings and restore it to its peak performance.


Follow these simple steps, you can easily and effectively unpartition your hard drive in Windows 11/10/8/7. AOMEI Partition Assistant can be the best hard drive unpartitioning tool. Besides delete all partitions and SSD secure erase, it also has many other useful functions like delete partition, create/move/resize/format partition, wipe hard drive, migrate OS to SSD, rebuild MBR and so on.

You can also use the function of Delete Partition to unpartition your hard drive too. If you need to allocated free space from one partition to another, you can upgrade to AOMEI Partition Assistant Professional.

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