Why you want to extend Windows 7 system partition?
“It is quite annoying when getting low disk space warning while working with my computer. It is like a threat that pushes me to delete files
to free up disk space, or it will damage my system so that I cannot use it any more.
Have you get such trouble on your Windows 7? Apparently, to extend Windows 7 boot
partition mostly is to give sufficient space for operating system as well as
installed applications. Deleting useless files or uninstalling programs fix this
trouble temporarily yet same situation comes in the near future.
Another motivation for this behavior could be make full use of hard drive space. For
example, you may want to extend C drive in Windows 7 to unallocated space or free
space which is idle on the hard drive. Surely, you can have another intention for
system partition extending in Windows 7. For instance, extend system partition size
to make partition size reasonable. Well, let’s find out how to extend system
partition in Windows 7.
How to extend Windows 7 system partition with built-in tools?
Windows 7 provides two disk partition managers that allow you to extend system
partition in Windows 7 free, GUI Disk Management and CUI Diskpart. Let’s get to know
them one by one.
Windows 7 Disk Management extend system partition
Disk Management in Windows 7 adds two new functions named “Shrink Volume” and “Extend
Volume”. "Shrink Volume" only creates unallocated space behind the
partition, and "Extend Volume" can only work when there is contiguous
unallocated space. Make sure you have unallocated space next to system
1. Open Disk Management [Computer > Manage > Storage] and right click Windows 7
system partition. Select “Extend Volume” from the given menu.
2. Follow the Extend Volume Wizard and click “Next” several times to complete.
Nevertheless, there are some limits you may want to know. To extend C drive to
non-adjacent space, you need to delete the partition between system drive and free
space. Otherwise, you’ll get into Windows 7 extend system partition grayed out
Diskpart: extend system partition in Windows 7
Another helpful tool is Diskpart.exe in Windows 7. It is more advanced operating
method with which operations cannot be returned. Therefore, use this program with
1. Open Run [press Windows key and R key simultaneously] and type “diskpart” and
press Enter. Run as administrator.
2. Input commands below in order and each command has an “Enter” followed by.
Go check in Disk Management and you’ll find system partition has been extended.
However, when the unallocated space or free space does not adjacent to system drive,
Diskpart cannot extend system drive in Windows 7, and it will give you error message
saying: There is not enough usable free space on specified disk(s) to extend the
In that case, it is a good idea to turn to professional and reliable partition
manager. AOMEI Partition Assistant
Professional allows you to extend C drive in Windows 7 without formatting,
both 32-bit and 64-bit. You can extend NTFS boot drive with ease and without data
loss. Just to be on the safe side, backup important data beforehand.
Expand Windows 7 system partition via AOMEI Partition Assistant
Step1. Installl and run this software. Clearly, behind G drive
there has a large size of unallocated space. Right click C drive and choose "Merge
Step2. In the following window, check system drive and all
unallocated space and click "OK".
Step3. Remember to click "Apply" to commit the task.
If there is no free space or unallocated space on your hard drive, to extend
system drive you can Allocate Free
Space from other redundant partitions.
To avoid low disk space warning appears on system partition, you can also
install applications and third-party software separately to system drive, data
partition for example.
In summary, it is not so hard to extend Windows 7 system partition using either Disk
Management or AOMEI Partition Assistant. However, for the safety of your data, it is
suggested to use the second method.
Apart from extending Windows system partition in
Windows 7, this method also applies to Windows 10/8/XP/Vista. AOMEI Partition
Assistant is all-around software, for example, you can shrink C drive beyond half with it when C drive is too large.