Why Windows 7 Cannot Create Primary Partition and How to Fix it?

October 10, 2017

In some cases, Windows 7 cannot create primary partition. This article will tell you why and how to fix it..

Scenario:

Some users are confused by Windows 7 cannot create primary partition with disk management frequently.

A win 7 user tells me that he wants to install dual boot system, and uses another primary partition to store the new OS. So he shrinks C drive by disk management but the new one is a logical drive.

A disk on MBR is allowed 4 primary partitions at most or 3 primary partitions and 1 extend partition. If you already have 4 primary partition, you are not allowed to create another one. If you have 3 primary partition and one extend partition, you can try to create a logical on the extend partition, and then convert logical to primary.

Why does Windows 7 cannot create primary partition?

The dual boot system is a really useful way to realize our needs which can provide a better performance or a better compatibility etc. However, when we try to install dual boot system, we are usually confused by windows 7 cannot create primary. What is the reason for it?  Let's see it.

1. It's related to the partition style on your computer. An MBR disk is allowed to create 4 primary partitions or 3 primary partitions and 1 extend partition. So if you already have 4 primary partitions, you can't create primary partition. If you have 3 primary partitions and 1 extend partition, you can convert it to primary. In addition, you can convert MBR to GPT. GPT disk is no limitation on the number of primary partition and you can create primary up to 128.

2. The disk has insufficient free space to create primary partition. In this way, you have to back up your files and data, format it and create partition again. Or you can change your disk with a larger hard disk, such as HDD, SSD etc.

Currently, you may get the reason why windows 7 cannot create primary partition. Next, we will say how to solve the problem windows 7 cannot create primary partition.

How to fix Windows 7 cannot create primary partition?

Create primary partition in Disk Management

Step 1: Right click the partition you want to create primary, selectNew Simple Volume.

New Simple Volume

Step 2: Subsequently click Next and Finish. Then you will see a new primary partition(G).

New Primary

That's all the steps you need to do. In the second window, you can see three primary partitions. If you try to create another partition, it will be a logical partition by default. It is annoying in reality. There is no way to create more than 3 primary  partitions. If you want to create more than 3 primary partitions on MBR disk, you can create primary partition using Diskpart or directly turn to a professional partition manager ike AOMEI Partition Assistant.

Create primary partition using partition manager

After saying above Windows built-in tool, we will continue to tell you another freeware which can create more than 3 primary partitions easily.

Step 1:  Download AOMEI Partition Assistant, install and launch it. Then enter the main page, click one unallocated space and select Create Partition.

Create Partition

Step 2: Enter a new window, you will see following page. Please click Advanced and select Primary Partition in the drop-down box, then tick OK to continue the operation.

Primary Partition

Step 3: After all sets, then preview and click Apply.

Preview and Apply

Step 4: In this window, you can see all the detail information of creating partition. Click Proceed to ensure you want to execute this operation.

Proceed.gif

Step 5: Now, you just need to wait. After all the operation finish, you will receive a message like”Congratulation! All operations have been completed successfully ” then click OK.

Operation

If you do not have unallocated space on the disk, you can choose to change simple volume to primary partition on an MBR disk. In addition, if you want more than four primary partitions you can convert MBR to GPT.

Low disk space is the problem which upset many users. We know the simplest way is to increase the capacity of partition. That is all because of the improper distribution of disk during installation. To solve the problem completely, you can choose to create a reasonable primary partition size during installation. 

Create primary partition in Windows 7 during installation

We all know, the primary partition is the only partition which can be set active and used to boot  computer. If your computer does not exist active partition , the computer will fail to boot. The GPT disk is no limitation for the number of primary partition, so i will take creating primary partition in Windows 7 during installation on MBR disk as an example below.

Step 1:  After the first initial screen, you will see another window. In this window, you have to select one type of installation. You have to select the Custom(Advanced), as this is new copy of your windows.

Installation Type

Step 2: In the Install Windows pop-up, input“Shift+F10” and subsequently input”diskpart”>”list disk”>”select disk (number)”>”create partition primary”>”active” in the new window. After that, you will receive a message like “DiskPart marked the current partition as active” and click Next to finish all the later operation.

Diskpart

Summary

Windows 7 cannot create primary partition mainly depend on your partition style. On MBR, you can create 4 primary partitions at most. However, on GPT disk, you can create more than 4 primary partitions. If you just need 4 primary partitions, the MBR disk is good enough. If you want to more primary partitions, you can choose to convert MBR disk to GPT.