However, in some cases, the C drive fills up by itself which can be really hideous. Some users have reported that when they check the drive’s properties, it shows that the drive is full. However, when they open the drive and select all the folders, the size is but only a portion. Therefore, we are here to help you out of this issue.

What causes the C Drive to Fill Up by Itself on Windows 10?

Since the C drive is mostly the system volume, therefore, the disappearing of free space can be due to the following factors — We have salvaged a few effective solutions that you can implement to solve your issue. Please make sure to go through them all if the issue persists.

Solution 1: Scan your System

Starting off with the most general cause, you should run a thorough system scan using Windows Defender or any other third-party antivirus in order to detect any malware that is present on your system. If you have turned off your Windows Defender without having a third-party antivirus on your system, certain malware can easily corrupt your system as it is wide open. Hence, make sure to always have Windows Defender on except when it’s interrupting a certain task that you are performing. To perform a full scan on your system using Windows Defender, do the following:

Solution 2: System Restore Points

Like we mentioned earlier, in some cases, system restore points are allocated more space than that is required which results in the issue. Hence, to fix this, you will have to decrease the amount of space allocated to system restore points. Here’s how:

Solution 3: Running Disk Cleanup

Disk Cleanup is a utility that scans your hard drive and frees up space for you to utilize in the future. If you haven’t performed a Disk Cleanup in a long time, the temporary files stored on your C drive can be occupying lots of space. Therefore, to free up some space, you’ll have to delete the temporary files. Here’s how:

Solution 4: The Hidden Files

There are many hidden files created when you install Windows or after installing third-party programs which you cannot view or access by default. In order to view them, you’ll have to turn on the ‘View Hidden Files’ option. Here’s how: After you have done that, check your drive for any unneeded files that are consuming too much of the storage. However, make sure not to delete Windows system files as it will result in a system failure and you’ll have to reinstall Windows.

Solution 5: Checking for System Files Corruption

Sometimes, if your system files are corrupted or damaged, you won’t be able to utilize much of your C drive storage. System files corruption is critical and should not be taken on a lighter note. Nonetheless, there are Windows utilities that will scan your system for any corrupted files and repair them. In this case, we will be utilizing the CHKDSK utility which searches for any bad sectors on your drive and repairs them. For a more detailed guide, please refer to this article published on our side that will show you how to use CHKDSK.

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