One Download.
Managed Device
This setup is for a Windows laptop you own or administer. Download the installer package, extract it, then run the admin installer. The DNS filter and background services start automatically, and the browser extension shows the block page.
Why ContentBlocker?
ContentBlocker is built for a managed Windows install. It copies the app files, creates startup tasks, and prepares the device for centrally deployed browser policy.
Use it on a laptop you own or are authorized to manage.
- Supports Chrome, Edge, Brave, and Opera
- Admin installer prepares the device for managed browser policy
- Works with a bundled extension and backend services
- Designed for managed or self-owned Windows devices
Setup Preview
> Extracting files... OK
> Running Setup.bat as Administrator... OK
> Preparing for managed browser policy... OK
Core Features & Architecture
?? Admin-Friendly Setup
Includes an elevated setup script that copies the app files, creates startup tasks, and prepares the machine for managed browser policy.
?? Background Services
Runs a local backend and a companion service so rule checks and updates can happen without manual steps after setup.
?? Offline Database
Uses a local SQLite database to check domains and keep the core filtering available even if the network is unavailable.
? Page Filtering
Scans page content and blocks matching content based on the configured rules and categories.
?? Local Management
Lets you manage blocked sites, categories, and search terms from the extension popup after installation.
?? Admin Removal
Designed so the device owner or admin can remove it cleanly when they no longer want the device managed.
Simple Installation
Download the installer package, extract it, and run the admin installer with Administrator approval. Then install the extension and confirm DNS blocking. A managed policy tool is still required if you want standard users unable to remove the browser extension.
Download Package
Download the installer package to the Windows laptop you want to protect.
Extract Files
Unzip the package into a folder that you can keep on the machine.
Run Installer
Right-click Install.cmd and choose Run as administrator. If you want uninstall email alerts, keep your Resend API key ready when prompted.
Install Extension
Unzip the extension package, open chrome://extensions, enable Developer mode, and click Load unpacked to select the extension folder.
Confirm DNS Filter
Verify blocked domains fail to resolve and allowed domains load. DNS runs in the background after install.
Manage Blocklist
Edit C:\ProgramData\ContentBlocker\blocklist.txt to control DNS blocks.
Verify Installation
Run these checks after install to confirm DNS filtering and the extension are active.
- Blocked domains should fail to resolve (NXDOMAIN).
- Allowed domains should resolve normally.
- The extension should show the block page in Chrome.
Quick Checks
> Resolve-DnsName example.com -Server 127.0.0.1
> Get-Content C:\ProgramData\ContentBlocker\blocklist.txt -TotalCount 3
Need Help With Setup?
If you want help packaging the blocker, wiring the installer, or adjusting the local rules, reach out and we can keep the install path simple.
Contact us directly at: support@cognito.org
Email Support Team