diff --git a/bin/windows/run-all-petstore.cmd b/bin/windows/run-all-petstore.cmd
index 2b49a860a614..9a8bdab6821f 100644
--- a/bin/windows/run-all-petstore.cmd
+++ b/bin/windows/run-all-petstore.cmd
@@ -1,3 +1,11 @@
+REM this batch file will loop through all the .bat files under bin\windows\
+REM execute the script and check the error level to see if there's any error
+
+echo IMPORTANT: this script should be run by the CI (e.g. appveyor) only. There's no need to run this script to update Petstore samples for all generators.
+echo Please press CTRL+C to stop or the script will continue in 10 seconds.
+
+timeout 10
+
 for /f "delims=" %%i in ('dir /b ".\bin\windows\*.bat"') do (
 
   CALL .\bin\windows\%%i