[Solved] Not Enough Space on C Drive in Windows 11, 10, 8, 7

If you find there is not enough space on C drive in Windows 11, 10, 8, 7, here you can find the best way to solve this problem easily, no matter you want to reclaim some free space or add more space to C drive.


By Dervish / Updated on May 12, 2023

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Symptom: not enough space on C drive

Many Windows users may receive Low disk space waning, this means computer is reminding you that there is not enough space on C drive. At this time, the C drive does not have enough space to support software updates/upgrades, and program installation. What’s more, the Windows operating system will run slowly. And you cannot store more data/files. So, it is necessary to free up the C drive space.

Low Disk Space Warning

Why there is not enough space on C drive?

Many users may be puzzled about the reason of “not enough space on C drive”. What is taking up space on the C drive? In general, the main reason for the low disk space problem is that the C drive is occupied by many files, and the free space is very limited. If you saved large files to C drive that you are not aware of (For example, the default download folder is located in C drive), the space of C dive will get not enough too. Besides, some page files, temporary files, and other system files may take up space on the system partition.

Solutions to "not enough space on C drive" in Windows 11, 10, 8, 7

Don’t know how to solve the problem of “not enough space on C drive”? Here provides you several solutions to free up the disk space of C drive, including delete hibernate file, clean disk, uninstall programs, and try powerful partition manager.

▶ Solution 1. Delete hibernate file

Windows reserves about half of the RAM space for the hibernation file. If the computer RAM is 8GB, the hibernation file is about 4GB in size. The steps of delete hibernate file are:

Step 1. Go to start menu, type “cmd” and right click it to run as administrator.

Step 2. Type “powercfg.exe -h off” and press “Enter”.

Disable Hibernate

Then, you will see a few more gigabytes of free space on the system drive.

▶ Solution 2. Run Disk Cleanup

Disk Cleanup is a Windows built-in tool that cleans up Thumbnails, Windows Update files, Delivery Optimization Files, Temporary files and more. You can refer to:

Step 1. Right-click the disk and select "Properties".

Step 2. Click the "Disk Clean-up" option.

Step 3. Check the files you want to delete, and then click "OK".

Disk Cleanup Windows 11

▶ Solution 3. Uninstall some programs

Windows has many built-in programs (especially in Windows 10), and you may never use some of them. So, you can uninstall the programs that you do not actually need, and you can also uninstall the programs that won’t be needed in the future to free up space.

Step 1. Click the "Start" button.

Step 2. Then, click “Control Panel” > “Programs” > “Uninstall a program”.


▶ Solution 4. Move programs from C to another drive

If you don't want to uninstall or remove any programs, you can try to move installed program to another drive for freeing up space. Thus, you can use the AOMEI Partition Assistant Professional. It provides the "App Mover" feature, allowing you to transfer apps between different drives and make sure they will load successfully in the new path. Please free download it and have a try.

Free Download Win 11/10/8.1/8/7/XP
Secure Download

 Step 1. Install and launch PA Professional, click “Tools” on the right, then select the “App Mover” under "Free up".

Click App Mover

Step 2. Choose C drive and click "Next".

Choose Partition

Step 3. Select apps you want to move, choose the destination path and click on "Move".

Tick Apps

Step 4. Click "OK" on the pop-up window.


▶ Solution 5. Extend C drive

After figuring out how to free up space on C drive, you can also extend it. Usually, there will be extra free space on other partitions, you can use this free space to extend the C drive.

Can you add space to C drive? Yes, you can also try AOMEI Partition Assistant Professional, its "Allocate Free Space" feature can help you add free space from other partitions to the C drive on the same disk. 

Tip: If there is unallocated space on the system disk, merge C drive with unallocated space is another good idea to extend it.

Step 1. Right-click the D drive and select “Allocated Free Space”.

Allocate Free Space

Step 2. In the pop-up window, you can allocate free space from D drive to C drive. And click “OK”.

From D to C

Step 3. Finally, click “Apply”  to execute the progress.



Now, you know to deal with the problem not enough space on C drive. Besides Allocated Free Space, AOMEI Partition Assistant Pro also provides you many other useful functions like Wipe Hard Drive, Partition Recovery Wizard and so on. If you want to install Windows to USB someday, AOMEI Partition Assistant can help you too. If the operating system of your computer is Windows Server, please turn to AOMEI Partition Assistant Server to enjoy more advanced features.

Dervish · Staff Editor
Dervish is an English editor of AOMEI Technology; He is delicated to offering users easy and effecitve solutions for issuses related to disks and partitoins. In his spare time, he enjoy wathcning films, playing footable, traveling and so on.