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CCleaner Crashes on Windows 10: 5 Thorough Ways to Fix it

A system scan may do the trick

4 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Are you experiencingCCleanercrashes on Windows 10? Here is all you need to know about this problem.

If you have been a Windows user for a long time, then CCleaner is no stranger to you. For starters, CCleaner works to scan and delete unnecessary files to free up space in your computer storage.

As a third-party software, CCleaner also helps to resolve computer issues arising from old or corrupted files.

While the software is designed to help fix computer problems, it can sometimes run into an error itself. Users are reporting a crash issue in CCleaner while the tool is running.

Let’s discuss common causes and the best solutions.

What causes CCleaner crashes on Windows 10?

Several factors can cause CCleaner to crash (C000021A error). Here are the most common factors:

Below is a list of solutions to help you fix CCleaner crashes.

How can I fix CCleaner crashes on Windows 10?

Before you go into these solutions, you may consider using analternative disk cleanup software. It may save you the stress of troubleshooting.

1. Scan your computer for malware

The C000021A error sometimes arises due to malware on your computer. Malicious software could corrupt and remove runtime-related files.

Instead of using the built-in Windows Security system, acompatible antimalware in Windows 10should be suitable for protection and not interfere with other system settings or programs.

2. Update device drivers to fix the C000021A error

Driver updates are always available to download from software manufacturers.

The challenge, though, is the arduous task of finding the exact driver for the C000021A-related device. Worse, installing the wrong driver update can even lead to further issues.

You can also deal with this problem a lot easier by using specialized software to update drivers automatically. There are a few such third-party software, but we recommendOutbyte Driver Updater.

Here’s what you need to do:

Outbyte Driver Updater

3. Disable your antivirus

Note that the steps may differ depending on the antivirus that you use.

4. Download and install Windows updates

Microsoft constantly rolls out updates to improve Windows. But most users frequently ignore these updates, inadvertently or otherwise.

These updates, in fact, usually help to fix C000021A errors with the newest Service Pack and the latest patches.

5. Reinstall CCleaner

Disk Clean-up should be performed at least once a month as a preventative maintenance operation. Disk Clean-up may erase temporary internet data, downloaded application files, and offline web pages.

So, if CCleaner crashes on Windows 10, any of these fixes should help you resolve it.

You may also use disk clean-up to clear the recycle bin, erase temporary files, and delete thumbnails.

Finally, please leave your comments below and tell us what solution worked for you.

CCleaner Crashes on Windows 10: 5 Thorough Ways to Fix it#

What causes CCleaner crashes on Windows 10?#

How can I fix CCleaner crashes on Windows 10?#

1. Scan your computer for malware#

2. Update device drivers to fix the C000021A error#

Outbyte Driver Updater#

3. Disable your antivirus#

4. Download and install Windows updates#

5. Reinstall CCleaner#