diff --git a/RUNNING.txt b/RUNNING.txt
index 18c2032e677c..2fee1d377372 100644
--- a/RUNNING.txt
+++ b/RUNNING.txt
@@ -195,11 +195,23 @@ launches Java directly and does not use the script files.
 
       $CATALINA_HOME/bin/catalina.sh start
 
+NOTE: When using Windows PowerShell, scripts in the current directory
+must be executed with an explicit path. For example
+
+    .\startup.bat
+
+Running startup.bat without the leading ".\" may fail because
+PowerShell does not execute local scripts by default.
+
 (4.2) After startup, the default web applications included with Tomcat will be
       available by visiting:
 
       http://localhost:8080/
 
+NOTE: If no web application is deployed at the root context, accessing
+http://localhost:8080/ may return a 404 response. This indicates that
+Tomcat is running but no application is deployed.
+
 (4.3) Further information about configuring and running Tomcat can be found in
       the documentation included here, as well as on the Tomcat web site: