This is simple script which is using the Windows registry files to modify (disable/enable) the HP (or any other given) proxy. I find it annoying whenever I need to disable my proxy to go to my Internet settings and click like 10 times.

proxy.bat

@echo off

rem HP Proxy switch on/off
rem Author: Miglen Evlogiev <code@miglen.com>
rem Date: 3/10/2014
rem Version: 0.1

setlocal ENABLEEXTENSIONS
set KEY_NAME=HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings
set VALUE_NAME=AutoConfigURL
set HP_PROXY=http://autocache.hp.com/
set TCO=5

	for /F "usebackq skip=2 tokens=1-3" %%A IN (`reg query "%KEY_NAME%" /v "%VALUE_NAME%" `) do (

	rem Echo A %%A
	rem Echo B %%B
	rem Echo C %%C

	 IF [%%C]==[] (
			Echo 
			Echo There is NO proxy set!
			Echo Setting HP Proxy [%HP_PROXY%]
			reg add "%KEY_NAME%" /v "%VALUE_NAME%" /t REG_SZ /d "%HP_PROXY%" /f
			Echo DONE!
			timeout %TCO%
			goto exit
			
		) 
			Echo 
			Echo You have the following proxy set: %%C
			Echo Disabling proxy settings...
			reg add "%KEY_NAME%" /v "%VALUE_NAME%" /t REG_SZ /d "" /f
			Echo DONE!
			timeout %TCO%
	 
	  rem echo %%A
	)


:exit