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Resize System Partition | Extend Boot Partition

Updated on Dec 04, 2018 by Tracy King to Partition Master

Here we show you how to resize system or boot partition with professional partition manager software. Try this tutorial step by step to extend system/boot partition easily and safely in Windows Windows 10/8/7 or on Server.

The definition of boot partition and system partition

The boot partition is the disk partition that contains the Windows operating system files and its support files, but not all files are responsible for booting.

The system partition is a disk partition that contains the boot sector and files such as NTLDR that are needed for booting Windows XP and earlier. (Windows Vista, Windows Server 2008, Windows 7 and Windows 8 use a newer boot loader called bootmgr that replaces NTLDR and is configured by using BCDEdit.exe).

The system partition can be different from the boot partition, although they are often on the same partition (drive C:). Windows setup places the initial system partition based on motherboard BIOS settings. Bitlocker requires a separate, unencrypted system partition for booting.

Why need to Resize or Extend Boot/System Partition

As computer technicians, we are always asked with different questions, like how to speed up my computer and make it run faster, how to resize partition, especially extending boot partition or extend system partition on the server or non-server system without reboot to maximize computer performance. Users, especially server users prefer to extend system partition to make hard disks and computers run faster and optimize the usage of the space. Would you please tell me the safest way to resize/extend boot partition without data loss?

Can you resize/extend system boot partition with Disk Management

Actually, it's a technical issue to resize/extend boot system partition for common users. Maybe some people will say that you could use the Disk Management tool in Windows to resize a partition.

Indeed, you could create, delete, format, extend and shrink a partition. But is it the best choice to resize system partition or extend boot partition?

Actually, the answer is no since the Windows disk management tool has some limitations to manage disk partitions.

First, resize partition feature is only available in Windows 2008 Server, Windows Vista and Windows 7/8/8.1/10. If you use Windows XP users, you are just allowed to create, delete and format a partition.  

Second, it can only resize NTFS partition, repartition hard drive, or merge partitions.

Third, it can only extend the system or boot partition when there is unallocated space behind this volume, etc). If there is no free disk space behind the system or boot partition, the "Extend Volume" option will be unavailable.

Last, it doesn't allow you to preview or undo operation, which is terrible especially for server users.

Based on these disadvantages, to protect data and system security, we recommend you try to a third-party partition software to resize/extend system or boot partition. And EaseUS partition manager software is an ideal tool.

Resize/Extend Boot (System) Partition with EaseUS partition software

Providing you with basic and advanced features of partition management, it can help you resize system partition easily without data loss. Now, you can follow the tutorial step by step to extend system or boot partition. 

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 Windows 10 is supported

Step 1: Launch EaseUS Partition Master

Run EaseUS Partition Master

Step 2: Add space to the System C drive

1. Shrink partition and leave unallocated space for extending C: drive:

  1. Right-click on a partition next to the C: drive and select "Resize/Move".
  2. Drag the end of the partition that is next to the C: drive and shrink it, leaving unallocated space next to the system C: drive, and click "OK".

2. Right-click on the System C: drive and select "Resize/Move".

Extend System partition

To add space to the C: drive, drag the system partition end into the unallocated space.

Add space to C drive

Step 3: Confirm to extend system C drive

Click the "Execute Operation" button, it will list the pending operations, and click "Apply" to execute the changes and extend the C drive.

Confirm to extend system C drive

Resizing boot partition will be applied after you reboot the computer. If the file system of the boot (system) partition is NTFS, EaseUS Partition Master can also extend NTFS boot (system) partition with ease.