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Can I Format the System Partition? How to Fix System Partition is Not Allowed to Be Formatted

Updated by Tracy King on Nov 23, 2021
Written by Gemma
mins read

Overview of System Partition

The system partition contains boot files such as BCD, bootmgr, and boot.ini, as well as the area where the Windows operating system is installed. Formatting can delete all of the files on a partition and establish a new file system. However, your machine will not boot if the system partition is formatted. As a result, while Windows is running, users are unable to format or harm the system drive. Therefore, a user's screen can sometimes prompt, "system partition is not allowed to be formatted."

You might wonder if there is a way to format the system partition? Yes, you can format system partitions while Windows is not working, for example, in WinPE or on other PCs. After attaching the system disc to another computer as a secondary drive, you'll be able to format it effortlessly. If unplugging and plugging hard discs is inconvenient for you, try the ways below to finish the formatting operation.

Method 1. Format System Partition With EaseUS Partition Master

The efficient format tool – EaseUS Partition Master – makes formatting a hard drive partition simple. It is a partition manager designed for users to better manage their hard drives and partitions. It can not only format partitions according to your needs, but can also let you create, resize, transfer, combine, and clone partitions.

To format the system partition, you need to first create a bootable disk, boot your computer from the created disk, then format the system partition.

The following process may help you format the system partition. Read further to know more.

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1. Create a Windows Bootable Media with EaseUS Partition Master

Step 1. To create a bootable disk of EaseUS Partition Master, you should prepare a storage media, like a USB drive, flash drive or a CD/DVD disc. Then, correctly connect the drive to your computer.

Step 2. Launch EaseUS Partition Master, find the "WinPE Creator" feature on the top. Click on it.

Step 3. You can choose the USB or CD/DVD when the drive is available. However, if you do not have a storage device at hand, you can also save the ISO file to a local drive, and later burn it to a storage media. Once made the option, click the "Proceed" button to begin.

When the process finishes, you have successfully created an EaseUS Partition Master WinPE bootable disk. Now, you can manage your hard disks and partitions through the bootable drive whenever the computer fails to boot normally.

If you have RAID drives, load the RAID driver first by clicking Add Driver from the menu bar, which can help you add the driver of your device under WinPE environment, as some specific device cannot be recognized under WinPE environment without drivers installed, such as RAID or some specific hard disk.

2. Boot the Computer from the Bootable Media

Step 1. Restart your computer and long-press the F2 (depending on the computer you use, it could be F2, F8, or Delete ...) to enter BIOS.

Step 2. In BIOS, set to boot the computer from the bootable USB/CD/DVD.

3. Format the C Drive Using EaseUS Partition Master

After the startup, your computer will boot into a system with EaseUS Partition Master installed. Now your computer is using another operating system with formatting abilities. You can format the system partition now.

Step 1. Right-click the hard drive partition and choose the "Format" option.

Step 2. In the new window, set the Partition label, File system, and Cluster size for the partition, then click "OK".

Step 3. You can see a warning window, click "OK" to continue.

Step 4. Click the "Execute Operation" button in the top-left corner, then click "Apply" to start formatting the hard drive partition.

Method 2. Format System Partition Using Windows Installation Disc

This approach is a convenient way to format the C drive. You can format C drive using the installation disc for Windows 10, Windows 8, Windows 7, or Windows Vista. The steps to format the C drive are as follows:

Step 1. Insert the Windows Installation Disc and start the computer. Follow the instructions after inserting the CD into the optical hard drive.

Step 2. Click "Next" after selecting the language you want to use.

Step 3. Select "Install Now" and wait for it to complete. It isn't the same as installing the Windows operating system.

Step 4. Select "Next" after accepting the terms and conditions.

Step 5. Select Custom (advanced) from the drop-down menu. You'll get a list of all the drives that are currently installed. Next, select "Drive settings (advanced)" from the drop-down menu and click on "Next."

Step 6. Select "Format" from the drop-down menu. Windows will now begin the formatting operation on your hard drive.

Format with Windows setup

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With these methods above, you can format the system partition without hassle. But we still hope you can think twice before making the decision. If your purpose of erasing the operating system is to leave room for the new OS installation, then it is unnecessary for you to do that. Because when you install Windows on the disk that has an OS, the format will occur during the operating system installation.

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About the Author

Updated by Tracy King

Tracy joined in EaseUS in 2013 and has been working with EaseUS content team for over 7 years. Being enthusiastic in computing and technology, she writes tech how-to articles and share technical solutions about Windows & Mac data recovery, file/system backup and recovery, partition management and iOS/Android data recovery.

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Written by Gemma

Gemma is member of EaseUS team and has been committed to creating valuable content in fields about file recovery, partition management, and data backup etc for many years. She loves to help users solve various types of computer related issues.

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Product Reviews

Product Reviews

TrustScore 4.7 | 49 reviews
  • I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes. I also think the overall look and feel of EaseUS Partition Master Free makes whatever you're doing with your computer's partitions easy.

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  • Partition Master Free can Resize, Move, Merge, Migrate, and Copy disks or partitions; convert to local, change label, defragment, check and explore partition; and much more. A premium upgrade adds free tech support and the ability to resize dynamic volumes.

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  • It won't hot image your drives or align them, but since it's coupled with a partition manager, it allows you do perform many tasks at once, instead of just cloning drives. You can move partitions around, resize them, defragment, and more, along with the other tools you'd expect from a cloning tool.

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