ksecdd.sys

Windows Kernel Security Device Driver

System DriverTrustedSecurity

CPU Usage

0-2%

Memory

20-60 MB

Location

C:\Windows\System32\drivers

Publisher

Microsoft Corporation

Quick Answer

ksecdd.sys is a legitimate Windows kernel driver. It provides core security services and cryptographic support, and it loads at boot as part of the Windows security stack.

Is it a Virus?

✔ NO - Safe

Must be in C:\\Windows\\System32\\drivers\\ksecdd.sys and digitally signed by Microsoft

Warning

Essential driver; anomalies are rare but verify

If you see unsigned copies or multiple instances, run a system scan with Windows Defender

Can I Disable?

Disabling will compromise security features like BitLocker and Credential Guard

What is ksecdd.sys?

ksecdd.sys is a Windows kernel-mode driver responsible for core security operations within the OS, including cryptographic service interfaces and secure storage support. It loads during boot and runs with high privileges to protect keys and security tokens.

As a kernel driver, ksecdd.sys handles cryptographic tasks, interfaces with the Local Security Authority (LSA) and Protected Storage, and cooperates with Windows security features to protect data at rest and in transit.

Quick Fact: ksecdd.sys is a core component of the Windows security stack, ensuring cryptographic operations are performed in kernel mode to reduce exposure in user space.

Types of ksecdd.sys Roles

Kernel Security Driver: Provides core security services during boot and runtime
Crypto Interface: Offers cryptographic operations to Windows components
Credential Protection: Supports secure storage and tokens
Key Management: Handles key derivation and storage
Secure Channel: Supports secure communication with trusted services
System Integration: Interacts with BitLocker, Windows Hello, and Credential Guard

Is ksecdd.sys Safe?

Yes, ksecdd.sys is safe when it's the legitimate Microsoft driver loaded from the Windows System32 path.

Is ksecdd.sys a Virus or Malware?

The real ksecdd.sys is not a virus. Malware may masquerade as a similarly named file; verify digital signature and file path.

How to Tell if ksecdd.sys is Legitimate or Malware

File Location: Should be in C:\Windows\System32\drivers\ksecdd.sys
Digital Signature: Right-click the file > Properties > Digital Signatures should show a signature from Microsoft Corporation.
Resource Usage: Kernel drivers typically use minimal user-mode resources; excessive RAM/CPU in user tasks is suspicious.
Behavior: Loaded at boot and utilized by Windows security features; absence or unexpected behavior warrants a system scan.

Red Flags: If ksecdd.sys is unsigned, located outside System32\\drivers, or you observe unusual startup behavior, run a full system scan and verify with Windows Update.

Why Is ksecdd.sys Running on My PC?

ksecdd.sys runs as part of the Windows security stack and security-related features. It loads at boot and can stay resident to support crypto operations and secure key management.

Reasons it's running:

Boot-time security initialization: The driver initializes cryptographic subsystems during startup and configures security policies.
BitLocker and device encryption: If BitLocker is enabled, ksecdd.sys participates in key handling and drive decryption workflows.
Credential Guard and Protected Storage: Supports hardware-backed credential protection and secure token management.
System cryptographic services: Interfaces with LSA and crypto APIs used by Windows services.
OS updates and feature enablement: New security features may trigger driver activity or reinitialization.

Can I Disable or Remove ksecdd.sys?

No, it is a critical kernel driver required for security features and system integrity.