diff --git a/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1 b/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
index d4f837b52b..50d8789d26 100644
--- a/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
+++ b/autobuild/windows/autobuild_windowsinstaller_1_prepare.ps1
@@ -12,6 +12,8 @@ param(
     [string] $BuildOption = ""
 )
 
+# Fail early on all errors
+$ErrorActionPreference = "Stop"
 
 ###################
 ###  PROCEDURE  ###
@@ -20,13 +22,26 @@ param(
 echo "Install Qt..."
 # Install Qt
 pip install aqtinstall
+if ( !$? )
+{
+		throw "pip install aqtinstall failed with exit code $LastExitCode"
+}
+
 echo "Get Qt 64 bit..."
 # intermediate solution if the main server is down: append e.g. " -b https://mirrors.ocf.berkeley.edu/qt/" to the "aqt"-line below
 aqt install --outputdir C:\Qt 5.15.2 windows desktop win64_msvc2019_64
+if ( !$? )
+{
+		throw "64bit Qt installation failed with exit code $LastExitCode"
+}
 
 echo "Get Qt 32 bit..."
 # intermediate solution if the main server is down: append e.g. " -b https://mirrors.ocf.berkeley.edu/qt/" to the "aqt"-line below
 aqt install --outputdir C:\Qt 5.15.2 windows desktop win32_msvc2019
+if ( !$? )
+{
+		throw "32bit Qt installation failed with exit code $LastExitCode"
+}
 
 
 #################################
@@ -38,9 +53,16 @@ if ($BuildOption -Eq "jackonwindows")
     echo "Install JACK2 64-bit..."
     # Install JACK2 64-bit
     choco install --no-progress -y jack
+    if ( !$? )
+    {
+        throw "64bit jack installation failed with exit code $LastExitCode"
+    }
 
     echo "Install JACK2 32-bit..."
     # Install JACK2 32-bit (need to force choco install as it detects 64 bits as installed)
     choco install --no-progress -y -f --forcex86 jack
+    if ( !$? )
+    {
+        throw "32bit jack installation failed with exit code $LastExitCode"
+    }
 }
-
diff --git a/autobuild/windows/autobuild_windowsinstaller_2_build.ps1 b/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
index 84493d7823..b18394de1e 100644
--- a/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
+++ b/autobuild/windows/autobuild_windowsinstaller_2_build.ps1
@@ -2,7 +2,6 @@
 
 # autobuild_2_build: actual build process
 
-
 ####################
 ###  PARAMETERS  ###
 ####################
@@ -12,11 +11,15 @@ param (
     [string] $jamulus_project_path = $Env:jamulus_project_path,
     [string] $BuildOption = ""
 )
+
+# Fail early on all errors
+$ErrorActionPreference = "Stop"
+
 # Sanity check of parameters
 if (("$jamulus_project_path" -eq $null) -or ("$jamulus_project_path" -eq "")) {
     throw "expecting ""jamulus_project_path"" as parameter or ENV"
 } elseif (!(Test-Path -Path $jamulus_project_path)) {
-    throw "non.existing jamulus_project_path: $jamulus_project_path"
+    throw "non-existing jamulus_project_path: $jamulus_project_path"
 } else {
     echo "jamulus_project_path is valid: $jamulus_project_path"
 }
@@ -36,3 +39,7 @@ else
 {
     powershell "$jamulus_project_path\windows\deploy_windows.ps1" "C:\Qt\5.15.2"
 }
+if ( !$? )
+{
+    throw "deploy_windows.ps1 failed with exit code $LastExitCode"
+}
diff --git a/autobuild/windows/autobuild_windowsinstaller_3_copy_files.ps1 b/autobuild/windows/autobuild_windowsinstaller_3_copy_files.ps1
index 67b2f15813..dabd6660c2 100644
--- a/autobuild/windows/autobuild_windowsinstaller_3_copy_files.ps1
+++ b/autobuild/windows/autobuild_windowsinstaller_3_copy_files.ps1
@@ -2,7 +2,6 @@
 
 # autobuild_3_copy_files: copy the built files to deploy folder
 
-
 ####################
 ###  PARAMETERS  ###
 ####################
@@ -13,6 +12,10 @@ param (
     [string] $jamulus_buildversionstring = $Env:jamulus_buildversionstring,
     [string] $BuildOption = ""
 )
+
+# Fail early on all errors
+$ErrorActionPreference = "Stop"
+
 # Sanity check of parameters
 if (("$jamulus_project_path" -eq $null) -or ("$jamulus_project_path" -eq "")) {
     throw "expecting ""jamulus_project_path"" as parameter or ENV"
@@ -38,8 +41,8 @@ switch ($BuildOption)
 ###  PROCEDURE  ###
 ###################
 
-# Rename the file
-echo "rename"
+# Copy the file
+echo "copy"
 if ($BuildOption -ne "")
 {
     $artifact_deploy_filename = "jamulus_${Env:jamulus_buildversionstring}_win_${BuildOption}.exe"
@@ -49,8 +52,12 @@ else
     $artifact_deploy_filename = "jamulus_${Env:jamulus_buildversionstring}_win.exe"
 }
 
-echo "rename deploy file to $artifact_deploy_filename"
+echo "copying deploy file to $artifact_deploy_filename"
 cp "$jamulus_project_path\deploy\Jamulus*installer-win.exe" "$jamulus_project_path\deploy\$artifact_deploy_filename"
+if ( !$? )
+{
+		throw "cp failed with exit code $LastExitCode";
+}
 
 
 Function github_output_value
diff --git a/windows/deploy_windows.ps1 b/windows/deploy_windows.ps1
index 4084f20e07..77190118e2 100644
--- a/windows/deploy_windows.ps1
+++ b/windows/deploy_windows.ps1
@@ -1,4 +1,4 @@
-param(
+param (
     # Replace default path with system Qt installation folder if necessary
     [string] $QtInstallPath = "C:\Qt\5.15.2",
     [string] $QtCompile32 = "msvc2019",
@@ -10,6 +10,9 @@ param(
     [string] $BuildOption = ""
 )
 
+# Fail early on all errors
+$ErrorActionPreference = "Stop"
+
 # change directory to the directory above (if needed)
 Set-Location -Path "$PSScriptRoot\..\"
 
@@ -20,10 +23,6 @@ $DeployPath = "$RootPath\deploy"
 $WindowsPath ="$RootPath\windows"
 $AppName = "Jamulus"
 
-# Stop at all errors
-$ErrorActionPreference = "Stop"
-
-
 # Execute native command with errorlevel handling
 Function Invoke-Native-Command {
     param(