diff --git a/optional/install-vncserver.cmd b/optional/install-vncserver.cmd
index 1b7a678..8d826c4 100644
--- a/optional/install-vncserver.cmd
+++ b/optional/install-vncserver.cmd
@@ -1,4 +1,6 @@
 @echo off
+call check-for-admin
+if %ERRORLEVEL% neq 0 exit /b
 
 set SOFTWARE=..\software
 set MSI=vnc-setup.msi