Solved: C Drive Is Full After Windows 10 Update

C drive is full after Windows 10 update from Windows 7 or Windows 8? Read this article to get realize how to solve C drive full in Windows 10 quickly and effectively.


By Bryce / Updated on May 12, 2023

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C drive is full after updating to Windows 10

“Hi, guys! I have upgraded my operating system to Windows 10 from Windows 7. But now my C: drive is full after Windows 10 update. I’m not familiar with computer knowledge. I have no idea about what occupies my disk space on partition C and how to deal with this issue. Is there any advice? Thanks for your help!”

C Drive Full after Update

Free up disk space on C drive after Windows 10 update

Before taking measures to solve C: drive full in Windows 10, it is necessary to realize what is taking up C: drive. In general, C: drive is mainly occupied by lots of files: Page files, previous Windows installation, temporary files, other system files even large application files that you are unaware of. In order to fix C: drive is full after Windows 10 update, try the solutions presented in the following text.

Solution 1. Run Disk Cleanup to free up disk space

Disk Cleanup is a Windows built-in tool that can help you to delete files like system files, previous windows installation, Recycle Bin and so on to free up disk space. Follow the steps below:

1. In File Explorer, right-click C: drive and choose “Properties”.

2. In the pop-up window, click “Disk Cleanup” and waiting for the calculating process over.

Disk Cleanup


3. In the Disk Cleanup window, choose the files that you need to delete and click “OK”.

PS.: To avoid delete necessary files, you can click to confirm what the files are.

Solution 2. Uninstall unwanted applications to reclaim disk space

Some applications that you may never use can take up large disk space on C drive. At this point, you can uninstall these unnecessary applications in accordance with the following steps.

1. Click Start button and choose “Control Panel”.

2. In the pop-up window, go to Programs> “Programs and features

3. Now, you can see installed programs on the computer. Right-click the program that you don’t need and choose “Uninstall”.


Solution 3. Move application from C drive to another drive  to free up space

Or you can transfer some applications from C drive to another drive that has enough free space to fix the C drive full issue. To complete the task, you can employ a professional application mover, AOMEI Partition Assistant Professional (PA Pro).  With it, you can move one or multiple apps from C drive to another drive on the same hard drive or external hard drive safely and easily.  Now, see how it moves apps from C drive to another drive.

PS.: You can free download the demo version of PA Pro to simulate operation.

Download Demo Win 10/8.1/8/7/XP
Secure Download

Step 1. Install and run the application mover, go to “Free Up” > “App Mover”.

App Mover

Step 2. In the pop-up window,  choose C drive and then click “Next”.

Choose Partition

Step 3. Here all movable apps on C drive will be listed.  Choose one or multiple apps that you need to move and the destination partition ( here I choose D drive). Then click “Move”.

Choose Programs

Step 4. Confirm that you have closed the apps that you will move from C drive to D drive. Then, click "OK". 


Step 5. Wait for the move process to complete. Then, click "Finish". 


After the move, you can delete large files on your PC to release more space on the C drive.

Solution 4. Delete hibernate file to get more free disk space

The hibernation file may occupy a large space on C drive for a small hard disk. Thus, to get more usable disk space on C drive, you can delete hibderfile.sys file. Here are the steps.

1. In the Search Box, input “command prompt”, right-click Command Prompt among listed results, and choose “Run as administrator”.

2. In the pop-up window, type “powercfg.exe -h off” and Press “Enter”.

Delete Hibernation File

Then, you can gain some free space on partition C.

Enlarge C drive in Windows 10 to fix C drive full issue

Usually, you are able to solve C: drive full in Windows 10 after taking the solutions aforementioned. However, if you are still unsatisfied with the usable space on C: drive, you can get more usable space by extending C drive. If there is unallocated space adjacently behind C drive, you can use Disk Management to extend it. If there is no such unallocated space, it's recommended to apply the software mentioned above, AOMEI Partition Assistant Professional to reallocate space from another drive to C drive. 

Step 1. Install and fire up the software. In the main interface, right-click the partition that has enough space  (here is partition D) and choose "Allocate Free Space".

Allocate Free Space

Step 2. In the pop-up window, specify the free space to be allocated and choose which partition you want to extend.

Allocate From D To C

Step 3. Then click “Apply” to execute the operation.

Apply Allocate Free Space

Upgrade to a larger hard drive without  OS & apps reinstallation

When the capacity of your disk can not meet your demand for storing files and data, it is time to upgrade it to a large one. Otherwise, you are always bothered by problems like C drive is full after Windows 10 update. To avoid the trouble of reinstalling the Windows operating system and applications, you can clone your disk to a larger one in Windows 10 via AOMEI Partition Assistant. If you don’t want to copy the whole disk but need to keep the operating system, you can choose to migrate OS to a larger disk.

Wrap things up

It’s not a bad choice to free up disk space on C drive with different methods when C drive is full after Windows 10 update. However, if the C drive is not regulated properly at first or the capacity of the whole hard drive is not enough, you can extend C drive without data loss or replace your excising disk with a larger one.

Bryce · Staff Editor
Bryce is an editor of AOMEI Technology, he covers backup & restore, hard disk & partitions management, cloud files transfer, website & database backup and so on for AOMEI. He enjoys helping people find solutions to their problems. He loves traveling, Sleeping, reserching and so on. He enjoys helping people find solutions to their problems. He loves traveling, Sleeping, reserching and so on. He would like to spend all time on reaserching computer problems. He is a very cute boy.