Free Trial

FSBlocker: Secure your data. Control your processes.

FSBlocker is a kernel-level driver for application-based access control of critical data. It can be enabled on specific local or network drives to protect selected files or folders. Access policies define which applications have full access, read-only access, or are blocked entirely. FSBlocker provides essential application-based access control for your critical data.

FSBlocker Overview Video
Cristie Software Continuous Recovery Assurance
FSBlocker Overview
Access Policy Wizard
Registry Protection
User Management
Free Trial
Introducing FSBlocker | Cristie Software
FSBlocker Data Sheet (PDF)

FSBlocker Overview

FSBlocker restricts file and folder access to only the applications you specify.

Restrict file access to only the applications needed for creation or editing

For example, limit image file changes to only the approved graphics software in your production workflow.

Prevent accidental file deletion by blocking unauthorized changes

For example, prevent users from modifying or deleting files with Windows Explorer within backup folders.

Automatically maintains file and folder protection after application updates

Eliminates the need to regenerate application signatures as often required by other access control solutions. FSBlocker Signature Lock prevents cyberattacks from using application masquerading.

Access Policy Creation Wizard

Simple Automated Policy Creation

A built-in wizard simplifies policy creation by recording application activity and generating a list of programs that accessed data during normal operations. Users can then assign access levels for each application. FSBlocker creates a unique signature for every approved application, ensuring that only genuine, unmodified instances of selected applications can access protected files. Policies can also be created manually using application names.

FSBlocker Windows Registry Protection

Monitor Windows registry key activity and optionally block any modifications.

Protecting Windows registry changes is important because the registry is a core component of the operating system, and unauthorized or malicious modifications can have serious consequences. FSBlocker has two modes of operation providing registry change monitoring plus the option to block all registry changes.

User Management

OpenID Connect (OIDC) support

FSBlocker supports OIDC allowing users to verify their identity using a single set of credentials (e.g. users can use their corporate Microsoft login authentication).

The Cristie Software Blog

Press release: Cristie Software announces FSBlocker, a kernel-level driver for application-based access control of critical data.

Cristie Software announces FSBlocker application-based file access control.

March 2, 2026 No Comments

# ## News: Cristie Software announces FSBlocker, a kernel-level driver for application-based access control of critical data.

Cristie Software has launched FSBlocker, a kernel-level driver providing application-based access control for Windows systems. It prevents unauthorized modification or deletion of critical data, including backup stores. The utility intercepts file system calls to block malicious encryption attempts, offering a robust defense against ransomware.

Read More »
Clean Room Recovery | Continuous Recovery Assurance from Cristie Software

What is Clean Room Recovery in Cybersecurity?

January 14, 2026 No Comments

Clean Room recovery provides a secure, isolated environment to safely test and validate system recoveries after a cyberattack. By preventing reinfection from hidden threats like ransomware, it ensures recovery points are clean and reliable—making it an essential part of modern cybersecurity and business continuity strategies.

Read More »

Contact the Cristie Software team for more information

Whatever your replication and data recovery needs, we are here to help.

cristie software_logo-02
https://www.cristie.com/wp-content/uploads/2022/09/thub-logo1.png

Contact Us

https://www.cristie.com/wp-content/uploads/2022/09/thub-logo1.png

Thank you for contacting us. We have received your request.

https://www.cristie.com/wp-content/uploads/2019/06/gdpr_130px.png
Powered by  GDPR Cookie Compliance
Privacy Overview

This website uses cookies so that we can provide you with the best user experience possible. Cookie information is stored in your browser and performs functions such as recognising you when you return to our website and helping our team to understand which sections of the website you find most interesting and useful.