What is ksecdd?

Ksecdd.sys is a Windows driver. A driver is a small software program that allows your computer to communicate with hardware or connected devices. This means that a driver has direct access to the internals of the operating system, hardware etc. The free file information forum can help you determine if ksecdd.sys is a Windows system file or if it belongs to an application that you can trust.

Run a free scan to check for ksecdd drivers in need of updating

Ksecdd.sys file information

The process known as Kernel Security Support Provider Interface belongs to software Microsoft Windows Operating System by Microsoft (

Description: The original ksecdd.sys is an important part of Windows and rarely causes problems. Ksecdd.sys is located in the C:\Windows\System32\drivers folder. Known file sizes on Windows 10/8/7/XP are 92,928 bytes (37% of all occurrences), 92,288 bytes and 8 more variants. 
The driver can be started or stopped from Services in the Control Panel or by other programs. It is a Windows core system file. The program is not visible. The service has no detailed description. The ksecdd.sys file is a Microsoft signed file. ksecdd.sys appears to be a compressed file. Therefore the technical security rating is 3% dangerous; however you should also read the user reviews.

Uninstalling this variant: You can do the following:

Recommended: Identify ksecdd.sys related errors

Important: Some malware disguises itself as ksecdd.sys, particularly when not located in the C:\Windows\System32\drivers folder. Therefore, you should check the ksecdd.sys process on your PC to see if it is a threat. We recommend Security Task Manager for verifying your computer's security. This was one of the Top Download Picks of The Washington Post and PC World.


User Comments

KSecDD.sys is used by the SMB server in NT to authenticate users.
sometimes knowing somthing is of gr8 help an idea i have used myself is to check the values or varify things with a hexeditor you are looking also for a program called ksecdd.sys that is dependent on 2 filesthey are HALL.dll & ntoskrnl.exe HALL.dll uses soemthing knows as Spinlock and also FastMutex for devellopers and enthuseists the file type for KSecDD.sys is DRV and the file sub type is 7 i trully hope this help some of you and as always free information to all who need it :)
it causes my pc to blue screen
Ksecdd is a very thin component that NTFS calls to communicate with the LSA. Ksecdd is used to set up local procedure call (LPC) communications to the LSA. Another process its used for is encryption.
Seems to be damaged, windows does not start, windows installation does not work, saying that this file is missing.
wurde in meinem bluescreen angegeben
If it is disabled, Windows will blue screen on reboot. Restart machine using "last good config uration"
  Darias Lenoire  
Important. Do not delete or disable it. If you remove it, your computer will start, but Windows won't launch. Easily corrected in safe mode, but could be scary for a newbie, expensive for the non tech savvy, and a hassle for all else. Let ksecdd be.
  Heather F.  
is the current reason why my vista desktop won't launch windows, and safe mode doesn't even work.
In BootVis (Boot Analyzer Tool from MS) I see that Total Commander hangs 12 seconds while communication with KsecDD.sys during XP Boot process.
I ended up with the ksecdd.sys problem after the power was disconnected during upgrade installations during shutdown. (I always wondered what would happen if the power was turned off while the updates were being installed.) The funny thing is that the computer booted up after the power failure and loaded up Windows Vista just fine. I shut it down again and let the updates install, but the next time that I turned the computer on, I got the message that ksecdd.sys was missing or damaged and the Windows would not start. (I can't even start it up in safe mode to do a system restore.)
  Bee Gee  
I found in windows logs that KSecDD is being named in relation with anonymous logon and REMOTE_ACCESS. It seems to take control of LAN Manager . It appears to me that Microssoft is breaking into to my computer several times per day for the last three days. The username seems to be : FGTRFG$ The Logon is started with KSecDD-CHAP and Advapi The proces id is 696.

Summary: Average user rating of ksecdd.sys: based on 10 votes with 12 user comments. 10 users think ksecdd.sys is essential for Windows or an installed application. 3 users don't grade ksecdd.sys ("not sure about it").

Do you have additional information?

Best practices for resolving ksecdd issues

A clean and tidy computer is the key requirement for avoiding problems with ksecdd. This means running a scan for malware, cleaning your hard drive using 1cleanmgr and 2sfc /scannow, 3uninstalling programs that you no longer need, checking for Autostart programs (using 4msconfig) and enabling Windows' 5Automatic Update. Always remember to perform periodic backups, or at least to set restore points.

Should you experience an actual problem, try to recall the last thing you did, or the last thing you installed before the problem appeared for the first time. Use the 6resmon command to identify the processes that are causing your problem. Even for serious problems, rather than reinstalling Windows, you are better off repairing of your installation or, for Windows 8 and later versions, executing the 7DISM.exe /Online /Cleanup-image /Restorehealth command. This allows you to repair the operating system without losing data.

To help you analyze the ksecdd.sys process on your computer, the following programs have proven to be helpful: ASecurity Task Manager displays all running Windows tasks, including embedded hidden processes, such as keyboard and browser monitoring or Autostart entries. A unique security risk rating indicates the likelihood of the process being potential spyware, malware or a Trojan. BMalwarebytes Anti-Malware detects and removes sleeping spyware, adware, Trojans, keyloggers, malware and trackers from your hard drive.

Other processes

ksecdd.sys [all]