diff --git a/Vagrant/scripts/install-redteam.ps1 b/Vagrant/scripts/install-redteam.ps1
index 2222e47..a247c78 100644
--- a/Vagrant/scripts/install-redteam.ps1
+++ b/Vagrant/scripts/install-redteam.ps1
@@ -2,7 +2,7 @@
 
 Write-Host "$('[{0:HH:mm}]' -f (Get-Date)) Installing Red Team Tooling..."
 
-# Windows Defender should be disabled already by O&O ShutUp10
+# Windows Defender should be disabled already by O&O ShutUp10 and the GPO
 If ($hostname -eq "win10") {
   # Adding Defender exclusions just in case
   Set-MpPreference -ExclusionPath "C:\Tools"
@@ -10,6 +10,17 @@ If ($hostname -eq "win10") {
   Add-MpPreference -DisableRealtimeMonitoring $true
 }
 
+# Windows Defender should be disabled already by the GPO, sometimes it doesnt work
+If ($hostname -ne "win10") {
+  # Adding Defender exclusions just in case
+  Set-MpPreference -ExclusionPath "C:\Tools"
+  Add-MpPreference -ExclusionPath "C:\Users\vagrant\AppData\Local\Temp"
+  Add-MpPreference -DisableRealtimeMonitoring $true
+  # Uninstalling Windows Defender (https://github.com/StefanScherer/packer-windows/issues/201)
+  Uninstall-WindowsFeature Windows-Defender
+  Uninstall-WindowsFeature Windows-Defender-Features
+}
+
 # Purpose: Downloads and unzips a copy of the latest Mimikatz trunk
 Write-Host "$('[{0:HH:mm}]' -f (Get-Date)) Determining latest release of Mimikatz..."
 # GitHub requires TLS 1.2 as of 2/27