How to Solve System Partition Not Allowed to Be Formatted

"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.

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. Launch EaseUS Partition Master. Right Click C drive that you had moved the boot files, and choose "Format partition".

Step 2. Edit the partition you're formatting with the information of partition label, file system and cluster size.