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Windows Hardening Guide

Updated 2026

Telemetry reduction and endpoint security for Windows — BitLocker, local accounts, Defender hardening, and firewall lockdown for sovereignty-focused setups.

Windows baseline path
01
Clean ISO
Local account
02
BitLocker
Full-disk encrypt
03
Telemetry cut
Defender harden
04
Firewall
Endpoint rules

1. Factory Reset

  • Clean Windows installation from an official ISO.
  • Enable BitLocker.
  • Prefer a local account over a Microsoft account.

2. Core Hardening

Run the PowerShell hardening script and apply:

  • Telemetry and diagnostic data reduction
  • PowerShell and Defender hardening
  • Disable unnecessary services

3. Key Privacy Steps

  • Disable Cortana, OneDrive sync, and advertising ID
  • Use SimpleWall or advanced Windows Firewall rules
  • Enable Controlled Folder Access
  • Consider running Windows in a VM for high-risk tasks

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