Hardware-Rooted Security and Core Isolation

Disk Encryption and Boot Security

Reducing the Attack Surface with AppLocker

Network Level Hardening and DNS

Account Security and the Principle of Least Privilege

Want to go deeper? Windows 11 is arguably the most secure version of the operating system to date, but the default configuration is designed for compatibility rather than maximum resilience. Out of the box, many critical protections are either disabled or set to their most permissive levels to avoid breaking legacy software. For professionals and power users, this creates an unnecessary attack surface. Hardening Windows 11 isn't about running a dozen 'privacy' scripts that break system updates. Instead, it involves leveraging built-in enterprise-grade features and modern hardware standards to ensure that even if a system is compromised, the damage is contained and the data remains encrypted. Modern Windows security relies heavily on Virtualization-Based Security (VBS). This feature uses hardware virtualization to create a secure region of memory that is isolated from the normal operating system. This is where sensitive processes like the Kernel Mode Code Integrity (KMCI) and the Local Security Authority (LSA) process reside. If an attacker gains administrative rights on your machine, VBS makes it significantly harder for them to extract credentials from memory. To verify and enable these features, navigate to Windows Security > Device Security > Core Isolation details. Ensure that Memory Integrity is toggled on. If you encounter driver compatibility errors, do not disable the feature. Instead, identify the outdated driver and update it or remove the associated hardware. For those managing multiple machines, you can enforce this via the Registry or Group Policy. Additionally, ensure that Firmware Protection and TPM 2.0 are active in the same menu. These features prevent bootkits from infecting the system before the OS even loads. BitLocker is no longer optional for a secure setup. Without full disk encryption, physical access to your device means total access to your data. While Windows 11 Pro enables BitLocker easily, you should go beyond the default settings. By default, BitLocker often relies solely on the TPM for unlocking. This is convenient, but it means anyone who can boot the computer to the login screen can attempt to exploit vulnerabilities in the OS to bypass authentication. For maximum security, configure BitLocker to require a PIN at startup. This adds an extra layer of pre-boot authentication. You can configure this in the Local Group Policy Editor under Computer Configuration > Administrative Templates > Windows Components > BitLocker Drive Encryption > Operating System Drives. Set 'Require additional authentication at startup' to Enabled and check the box for 'Require startup PIN with TPM'. Once your local disk is secure, consider how your data moves across your network. If you are accessing files on a server, ensure you are using a secure tunnel. You might find our Practical Guide to Deploying WireGuard on Your Home Server useful for maintaining encryption while remote. Most malware relies on the user or a process executing an unsigned binary in a temporary folder. One of the most effective ways to stop this is by using AppLocker or Windows Defender Application Control (WDAC). While WDAC is the modern path, AppLocker remains highly practical for professional workstations. The goal is to create a policy that only allows applications to run if they are installed in protected directories like C:\Program Files\ or if they are signed by trusted publishers. To get started, open secpol.msc and navigate to Application Control Policies. You can start by right-clicking 'Executable Rules' and selecting 'Create Default Rules.' This ensures that Windows and installed programs function normally while blocking random .exe files from running out of the Downloads or AppData folders. Always test these rules in 'Audit Only' mode first to ensure you don't lock yourself out of critical tools. Security does not stop at the OS level. Windows 11 now supports DNS over HTTPS (DoH) natively. This prevents your ISP or local attackers from snooping on your DNS queries. You can enable this in Settings > Network & internet > Ethernet/Wi-Fi > DNS server assignment. Set the DNS to a provider like Cloudflare (1.1.1.1) or Quad9 (9.9.9.9) and select 'Encrypted only (DNS over HTTPS)'. For a more robust solution that protects every device on your network simultaneously, you should look into a Pi-hole Setup Guide to block telemetry and malicious domains at the network level. Combining local OS hardening with network-wide filtering creates a layered defense that is much harder to penetrate. Running as a full Administrator for daily tasks is a significant risk. If a browser exploit or a malicious script runs under an Admin account, it has full reign over the system. Create a standard user account for your daily work and only use the Administrator credentials when prompted by User Account Control (UAC). This simple change stops a vast majority of automated exploits. Furthermore, ensure that UAC is set to the highest level: 'Always notify.' This prevents programs from making changes without a dimming of the desktop, which is a protected environment that scripts cannot easily interact with. To further secure your identity, move away from simple passwords. Using a dedicated manager is essential, and you can follow our guide on Setting up Bitwarden as your Password Manager to manage complex, unique credentials for every service you use. Our Home Network Security Setup Guide covers router hardening, DNS filtering, device monitoring, WireGuard VPN, and a complete firewall rule template. $12, instant download. Get the Security Guide Templates let you quickly answer FAQs or store snippets for re-use. Are you sure you want to ? 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