By Bryce / Last Updated December 8, 2020

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!”

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 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.

Solve C Drive Full After Windows 10 Update

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. Delete hibernate file to get more free disk space

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

Increasing space on C drive after Windows 10 update

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. As there are some limits to extend C: drive via Disk Management, you can try a great third party partition freeware – AOMEI Partition Assistant, which can allow you to increase partition C space with contiguous or non-contiguous unallocated space. You can get realize how to increasing partition C space via AOMEI Partition Assistant in the next context.

PS.: Supposed that there is non-contiguous space on the hard drive.

Step 1. Free download the software. Install and run it.

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

Step 2. In the main interface, right-click partition C and choose “Merge partitions”.


Step 3. As the following screenshot, select the unallocated space and C drive. Then, click “OK”.


Step 4. In the main interface, click “Apply” > “Proceed” to complete this operation.


✍ Notices:
▪ If the host partition (here is C drive) has free space less than 1GB, the option of Merge Partition will be grayed out. At this time, you can right-click D: drive and choose “Move Partition” to make the unallocated space behind C: drive; then, right-click C drive and choose “Resize Partition” to extend it.
▪ If there is no unallocated space and there is enough space on Partition D, you can allocate free space from partition D to partition C via AOMEI Partition Assistant Professional.

Increasing disk space by replacing the disk with a larger one

When the capacity of your disk can not meet your demand of 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 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 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 larger one.