By Bryce / Last Updated January 10, 2020


“After using a Windows 10 Dell laptop for a time, I keep receiving Low Disk Space warning on C drive. Then I open File Explorer and found partition C almost full. I didn’t put any files on this partition. Why is Dell C drive on Dell laptop getting full automatically? How can I fix C drive full issue?”

What is filling up C drive on Dell computer?

As the default download folder is located in C drive, you may have saved large files to C drive but you don’t know. Page files, previous Windows installation, temporary files, and other system files can take up system space on C drive as well. What’s more, if your computer is infected with virus, virus may generate files to fill up C drive.

How to free up space for C drive on Dell PC?

Here will offer you several ways to free up space for C drive on Dell laptop or desktop that is running Windows operating system.

1. Run anti-virus software to scan Dell computer

If there are chances that your computer is infected with virus, it is recommended to perform a virus scan at first. You can use Windows Defender or third-party anti-virus software to scan your computer.

2. Delete unwanted files on C drive

You can launch Disk Cleanup to delete unwanted files on C drive by following steps below:

Warning: Before deleting, you should make sure that you don’t need the files anymore.

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

2. In the pop-up window, click Disk Cleanup.

3. It will calculate the capacity of space that you can free up. Then, choose the files that you want to delete and click OK.

3. Uninstall unnecessary applications

If you have installed some applications on C drive and now you want to uninstall them to reclaim space, you can do as follows:

1. Press Windows +R, input control panel and go to Programs > Programs and Features.

2. Locate the program that you want to uninstall, right-click it and click Uninstall.

If there is still not enough space for C drive on Dell computer, you can try to delete hibernation file to free up disk space.

How to extend C drive on Dell computer?

If you have no intend to free up space for C drive on Dell computer, you can increase the capacity of system partition to fix Dell computer C drive full issue. When there is a contiguous unallocated space behind C drive, you can extend partition C effortlessly. But what if there is no such unallocated space?

Don’t worry, you can turn to a great partition manager – AOMEI Partition Assistant Professional to allocate free space to C drive from a partition that has enough space or add non-contiguous unallocated free space to C drive without data loss.

Now, install, run it and refer to the step-by-step guide (Taking allocating free space from partition D to partition C as an example). It’s available to download its demo version to have a try.

1. Right-click the partition that has enough free space (Here is Partition D) and choose Allocate Free Space.

Allocate Free Space

2. On this page, determine the size of free space that you want to allocate to C drive and choose C drive as destination drive. Then, click OK.

Allocate from D to C

3. You’ll return to the main console. If you are satisfied, click Apply and Proceed to commit the operation.

Apply Allocate Free Space


  • AOMEI Partition Assistant Professional edition works with Windows 10/8/7, XP and Vista; if you want to use it to extend C drive in Windows Server, you can employ AOMEI Partition Assistant Server edition.

  • If your current hard drive is too small, it is time to consider replacing it with a larger one. You can clone hard drive to larger one to avoid OS and application reinstallation.