Update atsetup.bat

encapsulate SET path

atsetup.bat

@@ -1,7 +1,7 @@
 @echo off
 cd /D "%~dp0"
 
-set PATH=%PATH%;%SystemRoot%\system32
+set "PATH=%PATH%;%SystemRoot%\system32"
 
 :: Generate the ESC character
 for /F %%a in ('echo prompt $E ^| cmd') do set "ESC=%%a"
@@ -681,4 +681,4 @@ exit /b
 
 :End
 echo Exiting AllTalk Setup Utility...
-exit /b
+exit /b