CapabilityAccessManager is devouring my hard drive

Question

CapabilityAccessManager is devouring my hard drive

Donald Gibson 100

Checking Storage in Settings (Windows 11) shows I have 83GB of Installed apps and 111GB of System and Reserved. Most people report System and Reserve should represent ~40GB. What is the extra 70GB?

Turns out it is a single file , a database for Capability Access Manager. Online commentors say it is supposed to store data for a month and then delete it. My file (and others on the internet) just keeps growing and today this single file is 66.5GB. My 221GB hard drive is full and my system is completely constipated.

Someone suggested deleting the file but I can't get at it. Completely protected by the program. I confess I'm not sophisticated enough to break through the security

I finally get through to Microsoft Support. She's never heard of the problem so check s with a supervisor. When she gets back online her solution is for me to buy a portable hard drive. Clearly this is a known issue but no amount of cajoling, begging or logic will get MS to budge. Can't help me. The support agent was adamant she was not allowed to assist me in deleting that file.

Won't help me.

Can anybody else?

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4 additional answers

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Answer 1

Emmanuel Santana 38,920 Independent Advisor

Hello. That file cannot be removed while the system is running normally. Try this to delete it:

Restart your PC while holding Shift, then choose Troubleshoot > Advanced options > Startup Settings > Restart.
Select Safe Mode.
Once in Safe Mode, open File Explorer and if I'm not wrong, go to: C:\ProgramData\Microsoft\Windows\CapabilityAccessManager Otherwise try to delete the file you have identified. But I believe it should be the file CapabilityAccessManager.db-wal.
Delete only that file (leave the main .db file in place).
Restart the computer normally.

After this, Windows should recreate the log file automatically, and it will return to a normal size instead of tens of gigabytes.

Donald Gibson 100 Reputation points

2026-03-10T17:42:02.03+00:00

Thanks for your nice clear directions and I followed them exactly. However, the system will not let me delete the file. Using File Explorer it won't even let me in the Capability Access manager folder. I then tried using TreeSize which let me see the files inside the folder, including the bloated file, but will not allow me to delete the file. Any suggestions on breaking through this security/ This is my personal desktop and I am the Administrator.
Emmanuel Santana 38,920 Reputation points Independent Advisor

2026-03-11T06:13:40.41+00:00
Thanks for the update. It can be tricky indeed. Normally this file never needs to be deleted, but if it grows to tens of GB like you described, removing the log file will not harm your system.

Try this method instead of File Explorer:

Open Command Prompt as Administrator.

Stop the Capability Access Manager service:

net stop camsvc

Take ownership of the folder:

takeown /f "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /r /d y

Grant administrator permissions:

icacls "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /grant administrators:F /t

Delete only the large WAL log file (leave the main .db file in place):

del "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager\*.db-wal"

Restart the computer.

After this, Windows should recreate the log automatically and it should go back to a normal size (usually only a few MB).
Donald Gibson 100 Reputation points

2026-03-11T17:16:22.92+00:00

You are a hero Emmanuel. Excellent stuff! Clearly you are very skilled in this area and I appreciate the help.

Your instructions went well until I got to the end when it wouldn't allow me to delete because another process was using the file.I restarted in safe mode and made sure CapabilityAccessManager was shutdown then proceeded with your directions. My CapabilityAccessManager*.db-wal file dropped from 66.5 GB to 1.0 MB. After restart all systems seem fine including CapabilityAccessManager.

Thankyou Thankyou.
Emmanuel Santana 38,920 Reputation points Independent Advisor

2026-03-12T01:03:51.9133333+00:00

Glad I could help, Donald! You're always welcome back to the community, happy to assist anytime.
Erik 36 Reputation points

2026-03-22T18:29:36.6533333+00:00

Indeed, thank you for this solution, Emmanuel.

This worked perfectly, and would have taken me exactly forever and a day to figure out myself.

Hope that others find this answer, and apply it, as this issue can be a machine killer.

Again, thanks much!
Λ H S Ξ N 20 Reputation points

2026-03-26T19:42:20.64+00:00

You can delete the entire folder containing CapabilityAccessManager.db-wal and it will be reconstructed on the next restart. I had to change the folder ownership to myself and boot into safe mode to delete the folder. DO NOT delete just the file as that will break wifi and screen capture. presumably microphone and location as well but I didn't test that.

I originally deleted that single file and it broke these things. I figured out the solution thanks to this post. now I'm going around to all the places I got info from to hopefully help others with the same issue https://www.reddit.com/r/WindowsHelp/comments/1rwkisj/removed_capabilityaccessmanagerdbwal/

I would greatly appreciate if you could update your post to reflect this information
Ken Hine 5 Reputation points

2026-03-27T02:20:51.0366667+00:00

Emmanuel Santana - Thank you! With my Win11Pro install: I had to reboot into Recovery and choose Command Prompt. Followed the directions and found the C:\ProgramData...\CapabilityAccessManager.db-wal file which I had previously found to have ballooned to 468Gb (512Gb drive). Once deleted and laptop rebooted, the machine ran just fine. My Wifi had previously been taking nearly 5 mins to reconnect after a reboot and this time reconnected immediately upon restart. Thanks!
Emmanuel Santana 38,920 Reputation points Independent Advisor

2026-03-27T04:32:54.7133333+00:00

@Λ H S Ξ N Did you stop the service before deleting the file? That step is important because the file is actively in use; if it’s removed while the service is running, it can cause things like Wi-Fi or screen capture to break, which sounds like what happened in your case.
Chandan Kumar 10 Reputation points

2026-03-27T11:20:35.8233333+00:00

it worked !

but to my notice again this db file : CapabilityAccessManager.db-wal is growing again at very high speed, 100MB in 1 hour. It needs to stop or clean automatically , it also consume high CPU and heating the laptop
Donald Gibson 100 Reputation points

2026-03-27T16:54:07.36+00:00

I noted the comment that the file begins to grow after being deleted as per Emmanuel Santana's directions. I just checked mine and, yes, it is growing again. 6Gb in about 2 weeks. In y research I was told the normal operation of this service stores data and THEN DUMPS IT AFTER ONE MONTH. I don't know if this is true or not as it hasn't been a month since my deletion of the problem database file. I will check it in 3 or 4 weeks (providing it doesn't become a problem before then. If necessary, I'll just go through Emmanuel's delete instructions again.
Tino 0 Reputation points

2026-03-31T08:42:36.25+00:00

Thank you so much. Mine was sitting at around 120gbs before
Russ Parman 0 Reputation points

2026-04-03T23:55:48.7766667+00:00

After taking ownership of the directory and deleting the bloated .dB, when rebooting to normal mode wifi and screenshot were no functional as reported above. What a major flaw by Microsoft ! Now I'm going to try the full delete scenario .
Don Spencer 5 Reputation points

2026-04-07T12:43:06.59+00:00

Emmanuel Santana, what an elegant solution! this file was strangling my hard drive, now I'm back to having room to operate again.

could those commands be put together as a batch file?
Chris 5 Reputation points

2026-04-17T16:17:39.85+00:00

Thank you Emmanuel for the instructions on how to run the "Open Command Prompt as Administrator". I am completely illiterate when it comes to these computer commands. Your instructions were very clear and most importantly helped me solve my issue. I have my storage back and all my accessories work. Peace and love.
Tim David 10 Reputation points

2026-04-21T00:28:21.5333333+00:00

@Emmanuel Santana Thank you, but should I delete only the .db-wal file or should I delete the whole folder? I'm seeing lots of answers that suggest deleting the whole folder over just the .db-wal file, like here: https://learn.microsoft.com/en-ca/answers/questions/5856859/why-is-capability-access-manager-growing-1-9gb-day
Tim David 10 Reputation points

2026-04-21T00:32:23.96+00:00

@Donald Gibson Any updates? Did the files clear on their own after a month?
Emmanuel Santana 38,920 Reputation points Independent Advisor

2026-04-21T01:22:47.53+00:00

Hello @Tim David , I recommend deleting only the large WAL log file, not the entire folder, as it will rebuild itself. Also, be sure to stop the service beforehand; otherwise, you may encounter the same issues others have experienced, such as Wi-Fi and other functions not working. This method has worked for many.
Erik 36 Reputation points

2026-04-21T12:53:10.3133333+00:00

Update: As I noted previously, this approach worked beautifully, especially the update script.

However, this morning, after a reboot, I found that my machine did not want to let me log in. Why? Because I did not have an internet connection. It told me to try a different method of logging in. However, there is no other method available currently.

And why did I have no internet? Because it turns out that my entire C:\ drive was suddenly backfilled with a massive DB file for this service. No idea how it found a way to populate it, but given that my laptop (which is only four years old, and very much suitable for my work) has a small C: SSD drive and a much larger D: platter drive.

I'm mentioning this because between this error and the need now to be online to log in is creating a deadlock condition which I could easily see forcing a reinstall of windows completely. Something else that we are no longer really allowed to do ourselves.
Arvok snaedal 0 Reputation points

2026-04-21T16:02:45.1066667+00:00

@Emmanuel Santana hello Emmanuel, I've attempted to use the command prompt thing, but when i put in the delete command, it tells me I can't because the file is in use. I cant seem to make it not in use. How do I resolve this?
Donald Gibson 100 Reputation points

2026-04-21T17:59:55.4966667+00:00

Responding to Tim David's question.

I cannot tell if it is deleting data after one month. The file has grown to 9GB since I deleted it but I can't tell if it is still growing or not. I am unable to see any files or data in the WAL log file, even using TreeSize. I'm resigned to deleting the WAL file every now and then when it gets too large. Not a big deal once you know how. Thanks again Emmanuel,

In response to a couple of other comments on here, you have to read Emmanuels directions VERY carefully and there were two consecutive responses from him. Two critical components of his directions are (1) stopping the service before trying to delete and (2) ONLY deleting the WAL file. I'm guessing Erik missed that part.
Tim David 10 Reputation points

2026-04-21T22:09:24.34+00:00

@Donald Gibson Thank you for the update, in response to your issue of TreeSize not seeing all the data, try using WinDirStat. It's much slower but it manually scans every single file. And the reason the file is still growing is because there is a application constantly which in my case was SmartByte that came pre-installed on my dell laptop.

Of course, if the solution of regularly deleting the file works for you, then there is no need to change it.
Tim David 10 Reputation points

2026-04-21T22:29:22.58+00:00

@Emmanuel Santana Just followed your steps, and I cannot thank you enough. Nothing broke at all and my wifi speeds are 10x higher than before (no seriously, I went from 60mb/s to 600mb/s). Hopefully things stay this way and CapabilityAccessManager can handle clearing itself from now on.

And again, Thank you so much :D
Josiah Tung 5 Reputation points

2026-04-24T03:11:32.51+00:00

Thank you Emmanuel, you're a true hero!!
Emanuil Karaivanov 0 Reputation points

2026-04-27T10:03:33.6733333+00:00

Hello, @Donald Gibson

Do you have an update on your situation? Is the file still less than 10 GBs? I deleted about two weeks ago as per @Emmanuel Santana 's instructions, and my laptop took a breath of air! -120 GB of memory on the spot. However, unfortunately, only 2 weeks later, the file has grown almost to 30 GBs again. Is there a permanent fix? From what I understand, other people's file repaired itself well after the first time, mine however is still seemingly growing.

Answer 2

I bumped this up a level so it is more visible as an 'answer' - albeit it is a mere tweak on what Emmanuel provided so all credit to him (I originally had it in the thread started by Anonymous user 10 March 2026)

**

Great thread that solved the same problem for me. Thanks to Donald for raising it and Emmanuel Santana for the advice.

I'll paste my slight tweak on the fix I needed to do and put it all here in one summary for anyone else needing help. I boldfaced a few points for emphasis (as others note: do NOT delete the db-wal file until AFTER you stop camsvc).

Context for anyone lost in the threads: What follows is how I followed the advice from Independent Advisor Emmanuel Santana responding to user Donald Gibson regarding the dramatic increase in ProgramData space being used by Capability Access Manager. Most of the text below is verbatim from Emmanuel (see above); credit to him for this fix

Start in SAFE MODE: Restart your PC while holding Shift, then choose Troubleshoot > Advanced options > Startup Settings > Restart.

1. Open Command Prompt as Administrator.

In my case, I had to do the next two steps in the order I write below; with the OP response, steps 2 and 3 were in the reverse order; if I used the OP order, then it would tell me the service was “stopping or starting please try again later”

2. Take ownership of the folder:

takeown /f "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /r /d y

3. You MUST first stop the Capability Access Manager service (do not delete files until you stop this):

net stop camsvc

4. Grant administrator permissions:

icacls "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager" /grant administrators:F /t

5. Delete only the large WAL log file (leave the main .db file in place):

del "C:\ProgramData\Microsoft\Windows\CapabilityAccessManager*.db-wal"

6. Restart the computer.

Per Emmanuel's advice and statements, after this, this outcome did indeed happen: “Windows should recreate the log automatically and it should go back to a normal size (usually only a few MB).”

I note that before the fix, my C: drive was at 200 GB and pretty much borked my computer because there were 0 (!) Bytes (!) left on my puny 256 GB C: drive. Others with larger drives have noted there seems to be a tendency for this to happen with the 256 GB drives BUT others report bigger drives just take a bit longer to fill up. Lots of chatter about this on reddit and Azure to the Max has a good thread on managing multiple units with this problem: https://azuretothemax.net/

The problem is likely to persist because the latest iterations of Windows updates have been terrible and one of them likely is not playing nice with the equally awful SmartByte app that Dell forces you to use (and is difficult to remove without breaking it). I have a Dell. I won't have it for long because SmartByte has long caused many problems. Even though this is likely a combination of bad Microsoft updates X SmartByte, the inherent issues with SmartByte prompted me to decide to abandon Dell.

As others note, apps like Rainmaker also seem to contribute to the ballooning CapabilityAccessManager*.db-wal file.

Thanks again Donald for a concise statement of the problem many of us have been having and Emmanuel for posting such a precise solution. While I knew which file was bloating and that I'd need to stop the service, the solution meant I could do so without killing my wifi or comm services.

Answer 3

I do not claim any expertise with PCs just my two cents in case it helps someone else with a DELL laptop.

I had the same problems as above - .db-wal had grown to about 90GB and seriously slowed my computer.

Following instructions as above I was able to delete the Capability folder

All was great for a while but checking the .db-wal file it was growing rapidly again - maybe 80 MB per hour.

I noticed switching off the Wifi stopped the rapid increments.

Trawling the internet I did come across suggestions the Network Management software/programs can affect this.

I have a DELL laptop (5515 W11 Home AMD Ryzen 7) and I found on Reddit someone who uninstalled Smartbyte (Network Management app) and cured their problem.

I did the same and deleted the Capability folder again and 30 hours later the .db-wal file is a modest 8 MB

I haven't noticed any adverse affects AND as a bonus I seem to have gained 2-300 Mb/s speed improvement with my laptop in it's usual spot, from 500 to 800 on a 1 Gb connection.

I have no idea if other manufacturers use similar apps.

Answer 4

I had the same issue last week.

My 464GB SSD was full, while I had only about 190Gb visibly used. Also, my computer was sometimes crashing and rebooting in the night, while there was no update.

CoPilot helped solve the problem, and my computer is now as brand new : it retrieved its speed, is more stable and the used space in my SSD is now 190GB.

I cannot summarize things here, because it took an afternoon to do it, but, briefly, the issue was in some specific folders, in which there were many hidden files, you cannot see even if askng to see them.

A usefult tool was WizTree (free), which can see those hidden files, and was great to help me find I had 172GB of DMP files (which record dumps details everytime the system crashes) and 72GB of db-wal files. All those files accrue when things do no run as they should when updating Windows or when Windows crashes. Normally, Windows should clean them, but it does not.

You can erase all the DMP files directly from WizTree. It is risk less, since those files are just kinda logs.

It's more tricky with db-wal files, which are under C:\ProgramData\Microsoft\Windows\CapabilityAccessManager. You will not see them in the explorer, but I assure you they are there. Since you are not the owner of the folder and they are in use, you cannot erase them directly (actually, I tried to put me as owner, but it created other issues I fortunately managed to solve). The process is more complex, and CoPilot should guide you with it.

Before that, you can erase all the files in C:\Windows\SoftwareDistribution\Download. Those are past Win update downloaded files. You can do it manually riskless. In my case, it allowed me to recover 12GB free space. When you erase them, they are actually recycled in the bin. Do not forget to make the bin empty afterwards. It can be long, since, in my case, I had almost 1 million files there, to send one by one to the recycle bin, then to erase defintely from the bin.

You will also find unnecessary files in C:\Windows\WinSxS, I had 27,000 files in it for 11,3GB. DO NOT try to erase them yourself. Ask CoPilot to guide you with the Dism.exe utility (you will have to type Dism.exe /online /Cleanup-Image /StartComponentCleanup in Powershell (admin)). But it's better to be guided.

I also eliminated 9,29GB of useless Restore points information.

And if you do not use the hibernation feature, you can recover 8-20GB there too in disabling it, which removes the hiberfile.sys file.

Lately, CoPilot will suggest you to check all your system with SFC and DISM. I read some users are not impressed by them, but, in my case, those functions made a great job of cleaning Windows and replacing bad or corrupt files with right fresh files. Be prepared to reboot several times in the process. But what is great is that CoPilot is still there, in the same discussion, to help you go on.

Sincerely, I was flabergasted by CoPilot. Once again, it took 6-8 hours, but it worthed it. I actually recovered 272GB of free space, speed and stability.

Hope that helps

Answer 5

Adding my own findings to this problem - user had full "0 bytes free" C:/ drive due to a 150+ GB CapabilityAccessManager.db-wal file.

After clearing the initial file, it was re-created and continued to grow roughly 1-2MB per minute as long as location services were enabled.

Further searching led to SmartByte network services and related programs being the culprit of the constant CAM writing. Uninstalled all related services and programs as well as all Dell OEM bloat programs to ensure they wouldn't get reinstalled and the file has stopped growing incessantly even with Location Services re-enabled.

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CapabilityAccessManager is devouring my hard drive

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