By Bryce / Last Updated December 7, 2020

Low Disk Space message appears

“My Windows 8-based PC saying “Low Disk Space. You are running out of disk space on system (C:). To free up on this drive by deleting old or unnecessary files, click here”. What is taking up disk space on C drive? How can I fix Low Disk Space error on Windows 8?”

Why C drive full in in Windows 8?

When Low Disk Space alert is showing up in Windows 8 C drive, it means that the partition has not enough free space, which can cause PC to running slow and apps to respond late. To better tackle with the problem, refer to the possible reasons that cause Low Disk Space alert on partition C: neglect large download files (its default folder is on C drive), paging files, hidden files, temporary files, backup files, previous windows installation files, etc.

If your C drive in Windows 8 becomes full without reason, you can take virus into consider. Since virus may generate files to fill your system drive.

Full guide to fix Low Disk Space in Windows 8

Now, you can try one or more solutions shown in the following content to tackle with the problem, according to different situations.

► Method 1. Scan your computer for virus
► Method 2. Run Disk Cleanup to free up disk space
► Method 3. Uninstall unwanted applications.
►Method 4. Extend C drive without data loss
► Method 5. Wipe your system hard drive and reinstall OS

Method 1. Scan your computer for virus

If you suspect that your PC is infected with virus, you can run anti-virus software, like Windows Defender to scan your computer.

Method 2. Run Disk Cleanup to free up disk space

To delete unwanted system files that cannot be deleted in File Explorer, you can run Disk Cleanup to reclaim disk space through the steps given below:

Step 1. Open File Explorer in Windows 8, right click C drive and choose Prosperities.

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

Step 3. Here you can see the files that you are allowed to delete. Choose the files that you don’t want and click OK.

PS.: Or you can click Clean up system files to remove files created by Windows.

Method 3. Uninstall unwanted applications.

There might be some seldom-used applications that takes up large space installed on your hard drive. You can uninstall these apps to free up disk space.

Step 1. Press Windows + R, input control and click OK.

Step 2. In Control Panel window, click Uninstall a Program under Programs.

Step 3. Installed programs will be listed; locate the one that you don’t need any more, right click it and click Uninstall.

Method 4. Extend C drive without data loss

If your system drive is allocated unreasonably at first, you can increase it’s space to fix Low Disk Space error. General, there are not contiguous unallocated space behind C drive and you can’t add non-contiguous unallocated space to C drive via Disk Management. Thus, you are recommended to use a partition manger software, AOMEI Partition Assistant Professional to allocate space directly from another partition to C drive.

It’s available to download the demo version of AOMEI Partition Assistant Professional to have a try!

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

Step 1. Install and run the software. Right click the partition with enough free space and choose Allocate Free Space.

Allocate Free Space

Step 2. Specify the how much free space that you want to allocate and choose C as the destination path. Then, click OK.

Allocate From D To C

Step 3. Finally, click Apply and Proceed to commit the operation.

Apply Allocate Free Space

Note: AOMEI Partition Assistant Professional is for Windows 10, 8.1, 8, 7, XP, and Vista. To allocate free space in Windows Server, please employ AOMEI Partition Assistant Server.

Method 5. Wipe your system and reinstall OS

If your PC is running extremely slow and all partitions on the system hard drive is almost full, it’s not a bad choice to wipe the whole system hard drive and then reinstall operating system. But you should back up all necessary files before wipe disk.