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Is your Windows 11 system drive rapidly losing storage space without a clear explanation? Consequently, a recent software bug might be the culprit. This problem originates within the operating system itself. Specifically, a system-generated database log file expands continuously. It can ultimately consume over 500GB of storage. Furthermore, the Storage Sense feature will display an abnormal spike in the “System & Reserved” category.
The Capability Access Manager Issue
Massive Log Files
The Capability Access Manager service is causing this massive disruption. Windows uses this service to record application permissions. For example, it tracks access to your camera, microphone, location, and screen. Normally, this database log occupies merely a few megabytes. However, some users report this file swelling dramatically from 70GB to 200GB. In extreme cases, the database file ballooned to an astonishing 513GB.
Affected Versions and Locations
This defect primarily impacts Windows 11 versions 24H2 and 25H2. Consequently, the system silently devours drive space without any explicit user actions. You can find the abnormally enlarged database log file at this exact path: C:\ProgramData\Microsoft\Windows\CapabilityAccessManager\CapabilityAccessManager.db-wal.
How to Verify Your System Status
Checking Storage Usage
First, navigate to Windows 11 Settings. Then, select System, followed by Storage, and Local Disk. Next, click “Show more categories” and choose “System & Reserved.” If the “System files” and “Reserved storage” metrics appear unusually high, your system is likely affected. Therefore, you should inspect the log file size immediately.
Command Prompt Verification
Strict permission settings lock the directory containing the db-wal file. Thus, you cannot view it directly through the standard file explorer. Instead, you must utilize an elevated Command Prompt. Simply run the following command to check the file size:
Under normal conditions, this database log file remains quite small. For instance, our test machines showed a mere 1.41MB. This low number indicates an unaffected system. Conversely, a gigabyte-level result confirms that the bug impacts your computer. Currently, deleting the file directly is not a recommended solution. You should only delete it if your system completely runs out of space.
How to Quickly Resolve This Bug
Installing the Update
Fortunately, Microsoft already addressed this defect. They released a fix within the KB5095093 preview update. Microsoft stated that this patch significantly improves disk space utilization for CAM files. Moreover, the upcoming stable release next week will deliver these corrections to all users. Meanwhile, affected individuals can install the preview update early to resolve the storage crisis immediately.
You simply need to visit Windows Update. Then, click “Check for updates” a few times. Normally, the KB5095093 preview update will appear. Alternatively, you can directly download the offline installation file for KB5095093. Follow the standard installation process and restart your system. Afterward, the database file should automatically shrink back to a normal size.
Alternative Workaround
What if the update fails to resolve the issue? In that case, you can manually adjust your system services. Open the Services application and locate the “Capability Access Manager Service.” Next, disable this specific service completely. Consequently, disabling it might successfully prevent the database file from expanding further.
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