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How to Solve System Partition Not Allowed to Be Formatted

Updated on Nov 29, 2018 by Daisy to Partition Master

System partition now allowed to be formatted can be easily solved by using a powerful partition management software. Step in and learn how to format system partition with ease.

"Please help. Do you know how to format C drive when you're kept telling that system partition is not allowed to be formatted?"

You can format C drive (or the system drive) at any time as long as you are not trying to format it within Windows. But if users are about to reinstall Windows, they don't have to format the drive first, because the Windows installation process will help do it. However, it's far from such simple cases that people request system partition format. Most commonly they want to wipe the drive clean and do a fresh or virgin install of Windows if they had a corrupted boot sector.

Since formatting system partition will erase all the data on it including the operating system and leave the machine unbootable, so you're not allowed to wipe or format directly. Here is a way out. Give up the little chance provided by Windows Disk Management, but turn to EaseUS free partition manager.

How to use EaseUS Partition Master to format system partition

Being different from format partitions on any other logical drives, as we discussed above the system partition won't allow you to format the drive because it contains operating system in it. Just leave the built-in disk management, and install a third-party partition manager on your Windows computer. All Windows 7,8 and 10 are supported.

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 Windows 10 is supported

To get started, move the boot files away from the system partition. There are many tutorials on the web teaching you how to do it. After that, install EaseUS Partition Master on your Windows computer, and learn the following steps to format C drive.


Step 1: Run EaseUS Partition Master, right-click the hard drive partition you intend to format and choose "Format".

Format Hard Drive Partition - Step 1

Step 2: In the new window, set the Partition label, File system (NTFS/FAT32/EXT2/EXT3), and Cluster size for the partition to be formatted, then click "OK".

Format Hard Drive Partition - Step 2

Step 3: Then you will see a warning window, click "OK" in it to continue.

Format Hard Drive Partition - Step 3

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

Format Hard Drive Partition - Step 4