diff --git a/files/builds/stable-branch/bin/install.sh b/files/builds/stable-branch/bin/install.sh
index 6c172d7..a3fb101 100644
--- a/files/builds/stable-branch/bin/install.sh
+++ b/files/builds/stable-branch/bin/install.sh
@@ -39,8 +39,26 @@ WP_DRIVER="DXVK"
 # Reset the logfile-value for the installation of Autodesk Fusion 360!
 SP_FUSION360_CHANGE=0
 
+REQUIRED_COMMANDS=(
+    "yad"
+    "wine"
+)
+
 ###############################################################################################################################################################
 
+function SP_CHECK_REQUIRED_COMMANDS {
+    for cmd in "${REQUIRED_COMMANDS[@]}"; do
+        echo "Testing presence of ${cmd} ..."
+        local path="$(command -v "${cmd}")"
+        if [ -n "${path}" ]; then
+            echo "Found: ${path}"
+        else
+            echo "No ${cmd} found in \$PATH!"
+            exit 1
+        fi
+    done
+}
+
 function SP_STRUCTURE {
   mkdir -p "$SP_PATH/bin"
   mkdir -p "$SP_PATH/logs"
@@ -1153,6 +1171,7 @@ function SP_COMPLETED {
 # THE INSTALLATION PROGRAM IS STARTED HERE:                                                                                                                   #
 ###############################################################################################################################################################
 
+SP_CHECK_REQUIRED_COMMANDS
 SP_STRUCTURE
 SP_LOGFILE_INSTALL
 SP_LOCALE_INDEX
diff --git a/files/builds/stable-branch/bin/uninstall.sh b/files/builds/stable-branch/bin/uninstall.sh
index de72521..1516eb4 100644
--- a/files/builds/stable-branch/bin/uninstall.sh
+++ b/files/builds/stable-branch/bin/uninstall.sh
@@ -20,8 +20,25 @@
 # Default-Path:
 DL_PATH="$HOME/.fusion360"
 
+REQUIRED_COMMANDS=(
+    "yad"
+)
+
 ###############################################################################################################################################################
 
+function SP_CHECK_REQUIRED_COMMANDS {
+    for cmd in "${REQUIRED_COMMANDS[@]}"; do
+        echo "Testing presence of ${cmd} ..."
+        local path="$(command -v "${cmd}")"
+        if [ -n "${path}" ]; then
+            echo "Found: ${path}"
+        else
+            echo "No ${cmd} found in \$PATH!"
+            exit 1
+        fi
+    done
+}
+
 # Copy the file where the user can see the exits Wineprefixes of Autodesk Fusion 360 on the system.
 function DL_GET_FILES {
   mkdir -p "/tmp/fusion360/logs"
@@ -204,6 +221,7 @@ function DL_WINEPREFIXES_DEL_INFO {
 # THE INSTALLATION PROGRAM IS STARTED HERE:                                                                                                                   #
 ###############################################################################################################################################################
 
+SP_CHECK_REQUIRED_COMMANDS
 DL_GET_FILES
 DL_LOAD_LOCALE
 DL_WELCOME