How to Expand or Extend Windows 7/8 Partition without Data Loss

Jean updated on Sep 12, 2019 to Partition Master | How-to Articles

Can You Expand a Partition in Windows 7

Windows 7, announcing to make your PC simpler and things you do every day easier, has come to us now. True, many Windows fans have rushed to use and test it before it releases officially and give a thumb up to its good performance and advanced features.

However, there are still some different voices, like "Windows 7 won't let me expand partition", "boot errors after expanding the Windows 7 partition". How to expand or extend partition in Windows 7/8 or even Windows 10, especially when to expand the system partition is needed?"

Method 1. Use Disk Management to Extend Windows 7 Partition

Please note that there must be unallocated space behind the partition which you want to expand with Windows built-in Disk Management utility.
Otherwise, you might find that the Extend Volume option is greyed out and not available.  

At this moment, you have two choices to solve this problem: shrink a partition and then extend the target partition with Disk Mangement tool or apply third-party partition manager software for help.

See the detail steps to see how can you expand your partition size with Disk Management in Windows 7 now:

1. Right-click My Computer and choose Manage -> Storage -> Disk Management.

2. Select the adjacent disk of the disk you want to extend, right click and choose Shrink Volume to create some free disk space.

3. Select the disk you want to extend, right click and choose Extend Volume to expand the partition.

extend windows 7 partition

4. Set and add more size to your target partition and click Next to continue. 

Follow the onscreen guidelines to complete the process.

Extend Windows 7 partition with Disk Managenent.

Method 2. To Expand/Extend Windows 7 Partition with EaseUS Partition Software

When Disk Management in Windows 7 cannot manage your partition as your desire,  or if you know little about Windows, an easier and safer alternative solution - EaseUS free partition software will be a nice choice to expand partitions in Windows 7. Here is the step-by-step guide.

EaseUS Partition Master, as a comprehensive hard disk partition tool, also works as system optimization software for Windows-based administration, not only enabling you to increase Windows 7/Windows 8 partition size without data loss, extending system partition without reboot can also be done on your own.

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 Windows 10 is supported


Step 1: Launch EaseUS Partition Master

Run partition manager software

Step 2: Free up space to extend partition

If the hard drive has enough unallocated space to extend the target partition, jump to Step 3 and continue.

If not, free up space first:
1. Right-click on a partition next to the target partition and select "Resize/Move".
2. Drag the partition ends to free up space, leaving enough unallocated space behind the target partition, click "OK".

Free up space to extend partition

Step 3: Extend partition

1. Right-click on the target partition and select "Resize/Move".

Resize target partition

2. Drag the target partition handle into the unallocated space to extend partition.

Add space to the target partition

Step 4: Keep all changes

Click the "Execute Operation" button and click "Apply" to keep all changes.

Keep all changes for extending partition


If you extend the Windows system C drive in Windows 7 or Windows 8/10 by following the above four steps with EaseUS Partition Master, and the program asks you to restart your PC.

Please do as the software required. All changes will be kept into the system and you'll get a bigger C drive after rebooting.


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Frequently Asked Questions

Why Choose EaseUS Partition Master?

"I've used Partition Master Professional many times to create, delete, format, move, rename, and resize partitions."PCWorld

"Partitioning tools have come a very long since the days of complicated command line utilities and EASEUS Partition Master is one of the most advanced programs available."TECH ADVISOR

"I love that the changes you make with EaseUS Partition Master Free aren't immediately applied to the disks. It makes it way easier to play out what will happen after you've made all the changes."Lifewire

Will the "Migrate OS" feature transfer the Windows system files only or the whole C drive?

To ensure that the migrated system will boot normally, the Migrate OS feature will transfer all the files in the system and the boot partitions. Generally, the boot partition is the C drive so the transfer will include all the files in C.

Does EaseUS Partition Master license apply to multiple computers?

The license of Partition Master Professional and Server editions can be used on 1 computer only, while that for for the Technician and Unlimited editions can be used on multiple machines.

What is the difference between EaseUS Partition Master Trial version and the Free version?

Free is for home users only, with most basic functions available such as partition resize and clone. While trial can help you understand how this product works and test what a full license can do on a business or server OS machine.

Will it cause any data loss after resizing the partition in EaseUS Partition Master?

Generally, it will not cause any data loss or boot issue by resizing a partition. However, in order to protect your data, we suggest that you backup the partition before resizing, in case of any unexpected situations such as power outages, computer hardware failures, etc. You can use EaseUS Todo Backup to backup the partition and its trial version is fully functioned for 30 days.

What should I prepare before resizing the partition?

On the partition that is going to be operated, there might be some files being occupied by other programs. To ensure a successful operation, we suggest that you close all the unnecessary software before resizing that partition. Otherwise, EaseUS Partition Master will detect the partition being locked by the other software and require a reboot to resize the partition under boot mode.

About EaseUS Partition Master

All-round disk & partition management software for personal and commercial use. Let it manage your storage drive: resize, format, delete, clone, convert, etc.