updateHostsWindows.bat: expand

- check if python runtime 3.5 is available on system
- update automaticaly hosts file before replace them

updateHostsWindows.bat

@@ -3,12 +3,34 @@
 :: Next DNS Cache will be refreshed.
 :: YOU NEED RUNNING THIS BAT FILE IN COMMAND LINE PROMPT WITH ADMINISTRATOR PRIVILIGES
 @ECHO OFF
+
+if not exist "%WINDIR%\py.exe" (
+	ECHO :: ERROR :: Python 3.5 Runtime NOT FOUND...
+	ECHO :: ERROR :: Download and install lastest Python 3.5 for Windows from https://www.python.org/downloads/
+	ECHO :: ERROR :: Exit...
+	GOTO END
+) ELSE ( 
+	GOTO PY35RT
+ )
+:PY35RT
+if not exist "%PROGRAMFILES%\python35\Python35.dll" (
+	ECHO :: ERROR :: Python 3.5 Runtime NOT FOUND...
+	ECHO :: ERROR :: Download and install lastest Python 3.5 for Windows from https://www.python.org/downloads/
+	ECHO :: ERROR :: Exit...
+	GOTO END
+) ELSE ( 
+	ECHO :: INFO :: Python 3.5 Runtime was found...
+	ECHO :: INFO :: Running main script...
+    GOTO DNSCHECK
+ )
+:DNSCHECK
 if not exist "%WINDIR%\System32\drivers\etc\hosts.skel" (
 	COPY %WINDIR%\System32\drivers\etc\hosts %WINDIR%\System32\drivers\etc\hosts.skel
 	GOTO :CLEARDNS
 )
 :CLEARDNS
+	updateHostsFile.py -a
 	COPY hosts %WINDIR%\System32\drivers\etc\
 	ipconfig /flushdns
 	GOTO END
-:END
+:END