> How to > Partition Manager > Free Fix Disk Management Can’t Extend Primary Boot Partition Error in Windows 10

Free Fix Disk Management Can’t Extend Primary Boot Partition Error in Windows 10

Updated on Jul 19, 2018 by Tracy King to Partition Manager

Summary:
C drive is full but you can’t extend the primary boot partition (C drive) with Disk Management tool? Relax! This article will explain why you can’t extend C drive even with free space behind and provides a free method for you to effectively fix ‘can’t extend primary partition’ error in Windows 10/8/7 within 3 simple steps.

Disk Management can't extend primary C drive even with free space behind, help!

"Yesterday, I was trying to increase my boot partition - C drive with more available free space on my PC. So I deleted the empty partition right behind C drive with Disk Management.

There, I got free space left right behind the boot partition - C: drive. Guess what? I was unable to extend my C drive even with free space. The 'Extend Volume' is greyed out in Disk Management. Yes, Disk Management can't extend boot C drive in my PC with free space left behind. So what can I do to complete the task now? I'm using Windows 10 by the way. Thanks for letting me know if you happen to just know something that can fix my problem."

According to Google searching result and multiple forums, it's not new that users may fail to extend their primary partitions or boot partition (C drive) with Disk Management even with free space right behind. So what else can you do to make the job done and increase space to your system C drive? Sure! Here, in the below, this article will explain why you can't extend boot partition or increase primary space with Disk Management and provide effective free solution here to help you complete the unfinished job - extend primary partition/boot partition with Disk Management alternative software.

Why Disk Management can't extend primary C drive, even with free space right behind?

To understand why the Disk Management can't extend primary C drive in Windows 10/8/7 or even earlier system, you'll need firstly to under stand that how many primary partitions and extend partitions that you can have in Windows system on one disk.

Each disk can only have up to four primary partitions or three primary partitions and one extended partitions. So here is the problem, at the very beginning, the primary partitions' space has been settled. And Windows system can't add free space or unallocated space from extend partition to the primary partitions. 

And this is why even though you have free space in your PC, even right behind the primary partition, you may still fail to extend it. Unless you delete or shrink the primary partition right behind the target partition which you wish to extend. 

If you don't have a second primary partition behind C drive, or you don't have any more free space to shrink for extending C drive, what else can you do to complete the task? Relax! Right now, we'll get all your problems solved with powerful free partition manager software.

Fix Disk Management can't extend primary/boot partition error with free partition manager freeware

So how to effectively extend boot partition and solve Disk Management can't extend primary partition error? Disk Management alternative free software will do. 

Here you may try EaseUS Partition Master Free which allows you to effectively add free unallocated space from extending partition to primary partition or boot C drive within only 2 simple steps in Windows 10/8/7.

Just free download, install it on your PC and follow below step by step guide to get your primary partition extended now:

Download Now

 Windows 10 is supported

Extend primary partition C drive in Windows in 3 steps:

Step 1. Launch EasUS Partition Master, right-click the partition (system C drive or another drive) you want to extend and choose "Resize/move partition".

Can't extend C drive in WIndows 10.

Step 2. Drag the right handle of C: partition frame rightward to extend if the free space is right behind C: drive;

Fix Disk Management can't extend C drive error in Windows 10.

If there is no free unallocated space right behind C drive, repeat to shrink partition and drag unallocated space behind the partition to extend partition by dragging the partition's right handle on EaseUS Partition Master Free.

Extend primary partition with partition manager freeware.

Step 3. Click "Apply" to complete the partition resizing job.

Extend primary partition within 3 steps.

See, this is it. You've successfully fix Disk Management can't extend primary C drive partition error with free partition manager software. If you can't increase partition, delete or create new partition with Disk Management, don't worry. EaseUS Partition Master will do.

Download Now

 Windows 10 is supported