The Lazy Way to Increase Primary Partition Size in Windows 7

June 20, 2017

If you want to increase primary partition without deleting any partition, you can make use of a magic third-party tool like AOMEI Partition Assistant.

Real Case about Increase Primary Partition Size in Windows 7

I have windows 7 installed in my C drive. I allocated 10 gig space to install the OS. After updates there isn’t much space left in the drive. I cannot extend the partition space. Is there any way I could do this without reinstalling the OS? I tried Disk Management, but it didn’t work.

                                             Extend Partition Grayed Out

The Reason and Solution to Extend Volume Greyed Out

A right adjacent unallocated space is the main requirement of Disk Management when you use Extend Volume. So if not, you cannot use it. That’s to say, the extend volume greyed out. At the same time, in Disk Management, you cannot move partition as well. In this case, some users try to delete an existing partition. Unfortunately, if the partition you delete is an extended partition or a logical parition, you still cannot extend primary partition unless you delete all logical partitions. But if you delete them, you will lose a lot of data you saved on the logical partition ahead of time.

Extend Partition Grayed Out with Logical Partition

In this case, you need a professional but easy-to-use tool like AOMEI Partition Assistant to help you to merge partition in Windows 7/8/10 without losing data. With it, even if the adjoining partition is logical partition, you still can increase primary partition. And it can support multiple operating systems, including Windows 7, Windows 8, Windows 10, Windows XP/Vista etc. At the same time, you still can partition multiple file systems, including NTFS, FAT32, FAT, EXT2, EXT3 etc. Aside by these, it still owns many other functions, containing both basic functions like Create Partition, Delete Partition, Extend Partition etc and advanced functions like Move Partition, Disk Management Combine Partition, Resize Partition, Rebuild MBR, Windows to Go Creator etc.

How to Increase Primary Partition Size in Windows 7/8/10

With the development of information era, extend primary partition in Windows 7/8/10 etc is becoming a common questions for computer users. So how to increase primary partition size in Windows 7/8/10 etc is an urgent event. We need to find a solution to it in a short time. When there is a right adjacent unallocated space, you can use the powerful built-in tool Disk Management. And if the adjacent partition is at the left of target partition, you can move partition first. However, when it comes to no unallocated space on the disk, the Disk Management will be unavailable. Thus, it's time for a professional third-party tool like AOMEI Partition Assistant. With it, you can create unallocated space with any existing partition even logical partition. Also, if you do not want to create unallocated space, you can directly extend partition. Below, I will show you how to increase primary partition size in Windows 7/8/10 with AOMEI Partition Assistant.

Step 1: Download and install AOMEI Partition Assistant.

Step 2: Enter the main page and select Extend Partition Wizard

Extend Partition Wizard

Step 3: Select the Operation Method you want

Extend System Partition

Step 4: In this window, just click Next to continue

Automatic or Not

Notice: As you can see from above window, there is a extending option at the bottom. If you tick the checkbox, the software will separately shrink some space from all other partitions and use it to increase your target partition.

Step 5: If you do not tick the checkbox at the bottom of the above window, you will see following window and select one or more partition manually.

Select Partitions

Step 6: Specify a size for your target partition and click Next

Increase Primary Partition Szie

Step 7: Preview the hard disk layout and click Proceed to finish the rest of the work.

Hard Disk Layout

Aside by Extend Partition Wizard, you still can delete extended partition to extend primary partition if there is no unallocated space and only have logical partitions. Merge Partition is still a way to extend your target partition. But you must make sure that the existing partition must be right or left adjacent to the target partition.


Up to now, you will find how to increase primary partition size in Windows 7/8/10 etc is not a problem anymore. Just try it, if you still be bothered by this question.