Extend system partition

How to extend system partition on Windows 7

Different with data volumes, system partition is very likely running out of space, because Windows Updates and many other types of files are generated every day. In this situation, nobody likes to start from scratch to reinstall Operating System and all programs. In this article, I’ll show you how to extend system partition in Windows 7 (32 & 64 bit) without losing data. As long as there is free space inside of any other volumes in the same disk, you can transfer to increase system partition size.

Windows 7 DM can’t extend system partition

Better than Windows XP, Windows 7 built-in Disk Management utility added Shrink Volume and Extend Volume functionalities, which can be used to change partition size. However, it is only an option to expand data drive, if you want to extend system drive without losing data, it is impossible.

When you decreasing drive D with Shrink Volume, Unallocated space is produced on the right side of D, but to increase C drive space with Extend Volume, Unallocated space must be on the left side of D. The only way to enable Extend Volume for C drive is by deleting drive D, but programs are installed in it, so you can’t do this. This is the reason why I said that Extend Volume is only an option to data drives.

In fact, if drive D is a Logical partition, you cannot extend C drive even if you delete it to get free space.

Extend Volume disabled

Extend system volume with software

The best way to extend system partition in Windows 7 is running professional partition software. Different with read-only program, disk partition software will modify the parameters of related disk, drive and files, so there is data loss risk. Better than other partition software, NIUBI Partition Editor is integrated with powerful 1 Second Rollback technology to ensure system and data intact. If any software error or hardware issue occur during resizing and moving partitions, it reverts the computer to original status automatically and rapidly.

To most of the computer users, system partition is the drive that Operating System installed in, which means C drive. But in Disk Management, the status of C drive is Boot, and the System Reserved partition is marked as System. With NIUBI Partition Editor, you can extend both C drive and System Reserved partition.

Extend system C partition

You can easily extend system partition C drive with free space inside of other drives in the same disk. Note: no partition software can extend system partition in Windows 7 with free space from another physical disk.

Download NIUBI Partition Editor and you’ll see all connected disk with partition layout on the right side. The available operations of corresponding disk partition are listed on the left side. In my Windows 7 laptop, there are several partitions in Disk 0. C drive is 30GB and D is 50GB, I’ll show you how to extend C: drive by shrinking D.

Extend system partition

Steps to extend system partition C in Windows 7:

Step 1: Right click drive D and select Resize/Move Volume, drag the left border rightwards to shrink it.

Decrease D

20GB free space is taken out from drive D and display as Unallocated behind C drive.

Unallocated produced

Step 2: Right click drive C and select Resize/Move Volume again, drag the right border rightwards to occupy the Unallocated space.

Extend C drive

As you see, C drive is extended to 50GB.

C drive increased

Note: the operations are listed as pending on bottom left, to take effect, click Apply on top left to execute. If you did something wrong, simply click Undo to cancel the pending operations.

Extend system reserved partition

Actually, it is not suggested to modify the System Reserved partition, however, you can accomplish with NIUBI if you want.

Similar with above steps, right click C drive and select Resize/Move Volume, drag left border rightwards to shrink it in the pop-up window.

Shrink C drive

Right click the System Reserved partition and select Resize/Move Volume again, drag the right border rightwards to hold the 10GB Unallocated space.

Extend system reserved partition

Note: different with shrinking other volumes, it requires reboot to shrink C drive. So remember to save your documents and other tasks before clicking Apply to take effect.

In Summary

To extend system partition on Windows 7 (both 32 & 64 bit), the built-in Disk Management utility cannot help you. To use third party partition software, you should select the reliable one because of data safety. As the safest Windows partition manager, NIUBI Partition Editor help you resize partition safely and easily. To extend system reserved partition or C drive, you just need to drag and drop on the disk map.

Download to try