Advanced Security Topics

For users wanting deeper security hardening or managing enterprise deployments, these advanced techniques provide additional protection.

Group Policy hardening

⚠️ Requires: Windows 10 Pro, Enterprise, Education (not Home)

Group Policy Editor allows granular security configuration:

Warning: Incorrect Group Policy changes can break Windows. Always backup before making changes.

Access Group Policy Editor

  1. Press Win+R
  2. Type: gpodit.msc
  3. Click OK

Key policies to harden

Navigate within gpedit.msc:

Disable unnecessary services

  1. Computer Configuration → Windows Settings → Security Settings → System Services
  2. Double-click service name
  3. Set Startup mode: Disabled
  4. Click OK

Configure password policy

  1. Computer Configuration → Windows Settings → Security Settings → Account Policies → Password Policy
  2. Adjust:
    • Minimum password length: 12
    • Maximum password age: 90 days
    • Enforce password history: 10 passwords
    • Complexity requirements: Enabled

UAC hardening

  1. Computer Configuration → Windows Settings → Security Settings → Local Policies → Security Options
  2. Adjust User Account Control settings
  3. Recommend maximum security settings

Credential Guard (Pro/Enterprise)

Isolates sensitive credentials in secure container to prevent credential theft even if malware gains admin access.

Enable Credential Guard

  1. Press Win+R, type gpedit.msc
  2. Navigate: Computer Configuration → Administrative Templates → System → Device Guard
  3. Set Turn on Virtualization Based Security: Enabled with UEFI lock
  4. Reboot required

Note: Requires compatible CPU (Intel VT-d or AMD-V). Check processor documentation.

Device Guard / Code Integrity

Restricts what code can run on system — only signed drivers and code permitted.

Enable configurable code integrity

  1. gpedit.msc
  2. Computer Configuration → Administrative Templates → System → Code Integrity
  3. Set Enforced Mode: → Enabled
  4. Reboot required

Effect: Prevents many malware attacks but can break some unsigned drivers. Test before production deployment.

DBAN (Darik's Boot and Nuke)

For secure drive wiping that prevents data recovery:

  1. Download DBAN from dban.org
  2. Create bootable USB
  3. Boot from USB on computer to wipe
  4. Select drives, wipe method (DoD 3-pass recommended for maximum security)
  5. Complete wipe prevents data recovery

Use case: Before selling/donating computer or removing sensitive data.

Warning: DBAN is destructive and irreversible. Triple-check selected drives before confirming.

Full Disk Encryption + Pre-boot authentication

Combine BitLocker with UEFI password:

UEFI/BIOS password

  1. Restart computer, press DEL, F2, or ESC (varies by manufacturer)
  2. Look for Security or System Security section
  3. Set Administrator Password (for BIOS access)
  4. Set User Password (required at boot)
  5. Save & exit

Effect: Even with physical drive access, attacker can't boot without password.

Combine with BitLocker

  • UEFI password prevents BIOS modification
  • BitLocker password protects drive encryption key
  • Two layers prevent attack vectors

Network isolation

Windows Sandbox

Isolated virtual environment for testing untrusted programs — automatically deleted after use.

  1. Settings → Apps → Apps & features → Optional features
  2. Click Add an optional feature
  3. Search & install Windows Sandbox
  4. Restart system
  5. Run Windows Sandbox from Start menu
  6. Run suspicious program inside sandbox (isolated from real system)

Tip: Perfect for testing downloaded utilities or suspicious email attachments safely.

Hyper-V isolation

More advanced than Sandbox; for testing entire environments:

  1. Settings → Apps → Apps & features → Turn Windows features on or off
  2. Check Hyper-V
  3. Restart system
  4. Launch Hyper-V Manager
  5. Create virtual machines for testing

Command line hardening

For advanced users comfortable with PowerShell:

Disable dangerous PowerShell features

# Run as Administrator
Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

This allows local scripts but blocks untrusted downloaded scripts — good balance of security and usability.

Warning: Never set execution policy to Unrestricted — that disables all protections.

Audit sensitive operations

Enable logging of sensitive PowerShell commands:

# Administrator PowerShell
New-Item -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\PowerShell" -Force
New-ItemProperty -Path "HKLM:\SOFTWARE\Policies\Microsoft\Windows\PowerShell" `
  -Name "ExecutionPolicy" -Value "RemoteSigned" -PropertyType String

Security baseline

Microsoft publishes recommended security configurations:

Apply baseline

  1. Download Windows 10 Security Baseline from Microsoft
  2. Extract to C:\Windows\System32\GroupPolicy
  3. Run: 
    gpupdate /force
  4. Restart system

Effect: All Microsoft-recommended security settings applied at once.

Threat modeling

For those managing sensitive data, assess threats:

Questions to ask:

  • What data do I need to protect?
  • Who might target this data?
  • What attacks are most likely?
  • Which controls provide best protection for risk?

Result: Prioritize security spending on highest-risk areas.

Incident response

If you suspect compromise:

  1. Isolate — disconnect from network immediately
  2. Document — take screenshots of suspicious activity
  3. Preserve — don't shut down; preserve evidence
  4. Notify — contact IT if business system
  5. Investigate — review Event Viewer logs, file modifications
  6. Recover — reinstall OS from clean backup

Professional assessment

For critical systems, consider professional security audit:

  • Penetration testing — professional attempts to break in
  • Vulnerability scanning — tools find known issues
  • Security audit — review against standards (NIST, CIS)

Cost: Ranges from $500-5000+ depending on scope.

Next: Resources & Further Reading