Effective C Drive Full Windows 7 Solutions

April 30, 2019

C drive is getting full and prompts low disk space warning in Windows 10/8/7, what can you do? This article brings effective C drive full solutions for Windows to teach you how to release or increase space on C drive.


My C drive has 50.7 GB. After checking the C drive space, I found that I only have 1 GB free space. After I clicked into my C drive and added up all the spaces taken up by my Windows 7 and other folders, I found out that I only used about 20 GB of space, which means I have around 30 GB of free space. Now there is not enough space in my C drive to download new programs or applications. Can anyone tell me some C drive full Windows 7 solutions so that I can get more spaces. Thanks!

C drive full solutions Windows 7/8/10

Because many programs are downloaded and installed onto C drive by default, previous Windows installation, temporary files, and other system files are still in the C drive, or some virus constantly generates files to C drive, the system partition is easy to get full and then triggers problems. Most obviously, the Windows OS will run very slowly even if you have migrated Windows to SSD; and you cannot install new programs or store new data on the system drive.

When it comes to fixing C drive full issue in Windows 10/8/7, you can either free up space on C drive or extend C drive space. Below we will share effective C drive full Windows 7 solutions from those two different aspects.

Part 1. Free up C drive space

Solution 1. Disable Hibernation

Hibernate is enabled by default to keep the content of your computer’s memory to the hard disk. And the generated hibernate files always take a large amount of space.So you can disable Hibernate to free disk space.

Click the “Start” button and type “cmd”, right click the Command Prompt icon and select “Run as administrator”.In the command prompt window, type “powercfg.exe /hibernate off”and press Enter.

Hibernate Off

Solution 2. PerformDisk Cleanup

Disk Cleanup allows you to remove some temporary files and other unnecessary data that you cannot delete in Windows File Explorer.So performing a Disk Cleanup is also a great C drive full solution.

Step 1. In File Explorer, right click the C drive and select “Properties”. Then click “Disk Cleanup”option in the window.

Step 2. Windows will scan your C drive and calculate how much space you can free fromthis drive.

Step 3. Select the files that you wish to delete from the drive, and hit “OK”.

Disk Clean

Solution3. Turn off System Restore

System Restore is used to restore Windows to an earlier state in time when Windows fails to start. It usually occupies much disk space, so turning it off could release some space:

Step 1. Right-click “Computer” and click “Properties”.

Step 2. In the left pane click “System Protection”.

Step 3. Choose the C drive you want to turn off System Protection, click “Configure”.

System Restore

Step 4. Select the option “Turn off system protection” and click “OK”.

Solution 4. Uninstall some unnecessary programs

Most programs are big and take a lot of space, so you can uninstall those you don’t use frequently. Click “Start”, go to “Control Panel”, click “Uninstall a program” under “Program”, then click “Uninstall a program” under “Programs and Features”,right click the program that you plan to remove, and click “Uninstall”.

Part 1. Extend C drive space

Besides freeing up disk space using methods above, you can also try to extend C drive to make it bigger.

Solution 1. Merge unallocated space into C drive

Usually, you can use Disk Management tool to extend system partition by right clicking it and choosing “Extend Volume…”, but the precondition is that there must be an unallocated space behind the C drive, otherwise the Extend Volume greyed out.

Luckily, AOMEI Partition Assistant Standard can cover such shortage of Disk Management. Whether the unallocated space is behind the C partition or not, the freeware can merge it into system partition in three steps.

Now free download it and have a try. (Window 10/8.1/8/7/XP/Vista 64-bit and 32-bit supported)

Step 1. Install and open AOMEI Partition Assistant Standard. Right click the C drive and choose “Merge Partition”.


Step 2. In this window, tick C drive and another an unallocated space, then click “OK”.


Step 3. Back to the main interface, click “Apply” and then “Proceed” to commit the pending operation. This operation requires a reboot after completed.



> If there is not unallocated space on the same disk, you can create unallocated space by “Shrink Partition” and “Delete Partition” feature of AOMEI Partition Assistant.

> You can also merge two adjacent partitions into a bigger one, but only merge data partition into system boot drive. That is to say you cannot merge system partition into data partition.

Solution 2. Allocating free space from other partitions to C drive

What’s more, if you upgrade to AOMEI Partition Assistant Professional, you will be able to directly allocate free space from another partition (ex: D partition) to C drive, which is a simpler, quicker and more convenient C drive full Windows 7 solution.

Step 1. In the main interface of AOMEI Partition Assistant Pro, right click the D partition and select "Allocate Free Space".

Allocate Free Space

Step 2. Here, you will know how much free space available on the D partition, and you can decide how much space you want to allocate to C drive. After everything is done, click "OK".

Allocate From D To C

Step 3. Back to the main interface, click "Apply" to execute this operation.

Apply Allocate Free Space