Have you noticed that your C drive in Windows 11 is filling up for no apparent reason? It’s not your fault. Microsoft has just confirmed that a hidden system file can take up to 500 GB of disk space, a real nightmare for users.
The problem is related to a file named CapabilityAccessManager.db-walThis file, which is supposed to weigh only a few megabytes, can grow enormously, depriving your system of precious resources.
This problem has raised many questions, and several users have seen their SSDs fill up in unusual ways. Here’s everything you need to know to sort out this mess.
Windows 11 and the invisible system file bug that eats up your disk space
Since the beginning of the year, many Windows 11 PCs have seen their storage space dwindle rapidly. Microsoft has finally admitted to a bug involving the Capability Access Manager service.
This service manages permissions when your apps request access to your microphone, camera, or location. Normally, a small log file keeps track of these requests. Except that this file, the CapabilityAccessManager.db-wal, ceases to purge itself and grows infinitely.
On some computers, the size of this file explodes, ranging from tens to sometimes more than 500 GB, which is completely illogical for a simple access log.
Why is this file becoming so huge?
The main cause of this inflation stems from a bug preventing the automatic purging of the file. This bug is triggered primarily when several applications request permissions in rapid succession, such as antivirus software, VPNs, and video conferencing software.
The lack of a size limit means the file grows 24/7 without any notification to the user. The result: disk space is silently devoured, and it can quickly turn into a nightmare!
How can I tell if my PC is affected?
The first indication is an abnormally high usage in the “System and reserved” section under Settings > System > Storage. You will see an exaggerated figure, often exceeding 20 to 30 GB.
Is your hard drive mysteriously filling up? Check this section immediately, because Windows doesn’t recognize the problematic file in its interface. The folder containing this file is inaccessible even to an administrator with full SYSTEM permissions.
For more technical details, some users attempt advanced commands in administrator mode, but they often run up against this imposed lock.
Microsoft’s discreet fix and solutions for recovering disk space
Microsoft released a patch, KB5095093, in late June, but without any official announcement. This patch improves the management of space in the CapabilityAccessManager.db-wal file by introducing a mechanism for forcing the file to be purged once it exceeds 32 MB.
For those who don’t want to wait, a manual method exists. It requires booting into safe mode to stop the CAM service, taking ownership of the locked folder, and then deleting the file. However, this operation is reserved for experienced users, as modifying these system files without caution can lead to complications.
The patch will be included in the July update, which will be automatically deployed to all recent Windows 11 systems. No need to panic, but it’s best to manage your storage space and be prepared.
Here are some tips to avoid this trap that eats away at your SSD
- Keep your apps up to date, especially software that may frequently request your permissions.
- Monitor disk space regularly in Settings > Storage to detect an anomaly before it becomes critical.
- Feel free to install update KB5095093 As soon as it is available, she will fix this sneaky problem.
- If in doubt, avoid manually deleting system files without backup or sufficient knowledge.
For more details, see articles like this practical guide and comprehensive analyses explain the origin of the problem and possible courses of action. You can also consult these technical explanations to understand the ins and outs of this bug.
Why is the CapabilityAccessManager.db-wal file growing so much?
A bug prevents the automatic purging of this log file when applications request system permissions en masse, causing it to grow without limit.
How can I tell if my PC is affected by this problem?
You need to check the ‘System and reserved’ category in Settings > System > Storage. An unusually high amount of storage space may indicate that you have this bug.
Is there a simple way to free up space?
The Microsoft patch fixes this issue. In the meantime, experienced users can restart in safe mode and manually delete the file.
Does the bug affect all PCs running Windows 11?
No, only certain systems, particularly those with many applications querying system permissions.
Can the file reappear after deletion?
Yes, Windows regenerates a new clean file upon restart.
Source: www.lesnumeriques.com