Update install.sh

src/install.sh

@@ -39,6 +39,14 @@ startWindows() {
 
   else
 
+    local detect_rc=0
+    detectIsoImage "$ISO" || detect_rc=$?
+
+    case "$detect_rc" in
+
+      0 ) ;;
+      1 )
+  
         if ! extractImage "$ISO" "$dir" "$VERSION"; then
           removeIso "$ISO" && return 74
         fi
@@ -48,7 +56,13 @@ startWindows() {
         if ! detectImage "$dir"; then
           abortInstall "$dir" "$ISO" "$boot" || return 76
           return 0
-    fi
+        fi ;;
+
+      * )
+        abortInstall "$dir" "$ISO" "$boot" || return 76
+        return 0 ;;
+
+    esac
 
   fi