Is There Any Way to Create a New Primary Partition on My Hard Disk in Windows 7?

At this moment, I have three partitions on one hard disk (300 GB), which has Windows 7 installed. Now I want to create a new primary partition on this disk because I have 100 GB of unallocated space left for a new OS. Is There Any Way to Create a New Primary Partition on My Hard Disk in Windows 7?

Best Answered by

Cici· Answered on Jul 18, 2025

If you want to have another Operating System on your hard drive that already installed Windows 7, you need to create a new primary partition on your hard drive in Windows 7. Thus, this post collected two effective ways of creating a primary partition in Windows 7. Read on and find more details.

For Beginners: EaseUS Partition Master 

The valuable data on the hard drive makes disk partitioning a thorny task, so EaseUS Partition Master is your perfect choice. This reputed third-party software can help you create, resize, clone, merge, move, and format partitions on your hard drives without the potential of losing data. You can manage the partitions quickly and effectively with its friendly interface and all-around functions.

Free Download 

Windows 11/10/8/7100% Secure

The step-by-step procedure is as follows:

Step 1. Install EaseUS Partition Master to enter the "Partition Manager" part, right-click on the Windows disk's unallocated space to click "Create."

Step 2. Confirm the default options or customize the partition size, drive letter, label, file system, and other advanced settings. Select "OK."

Step 3. Click "Execute 1 Task" and "Apply" to finish the disk partitioning.

For Experienced Users: Diskpart

Here is another practical method preferable for experienced users or developers - Diskpart. Diskpart can manage your partitions using different command lines as a flexible Windows built-in tool, including adding a new primary partition on your hard drive. Learn the steps below before getting started:

Step 1. Typing cmd in the Windows search box to boot Command Prompt. 

Step 2. Enter the below command lines in order and hit "Enter" after each:

  • diskpart
  • list disk
  • select disk P (Replace P with your disk number)
  • create partition primary size=2048 (change the number regarding your ideal partition size)
  • create partition logical

Step 3. Type exit to close Diskpart when all is done.

After the new primary partition is ready, you can read the following link to install another OS on your hard drive:

Related Reading: Install Two Operating Systems on One Computer

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