Many users after running anti-virus software have got rid of the problem.
Attack of Virus: Make sure that the system is virus free because sometimes virus can eat empty space of the disk and shows drive keeps filling automatically error.
Also the disk corruption can cause disk filling itself. In that case corrupted file has to be fixed.
System Corruption: In case of file system that gets corrupted, it will show free space incorrectly i.e.
The all possible reason behind this error listed below: The hard disk drive keeps filling up automatically is a serious concern. Reasons – Why C Drive Keeps Filling Up Automatically? Let’s first understand the reasons behind this error. So before discussion the methods to fix c drive keeps filling up for no reason automatically in windows. The main issue is that the disk space of C drive is not big enough to store large data due to which the problem occurs. These are the situations which can take place if the C drive is filling automatically. Due to the the reason of C drive filling up by itself, many situations can arise like the computer runs slow, users are unable to store more large files or data on it, hard disk drive is not big enough to accommodate all the needs of the user. This issue is persistent with all the versions of Windows like 10/8/8.1/7 etc. People do not understand the reason why it happens. There are many issues faced by the user specially regarding the use of hardware like in case of C drive keeps filling up automatically.