Data Execution Prevention (DEP)

Latley I was getting a lot of issues because of this "feature" in windows. It was preventing legitimate programs from working to include an install for Juniper SSL VPN.

Everytime I tried I would get a iexplore.exe - Application Error

The instruction at "0x4160068" referenced memory at "0x04160068". The memory could not be "written".

Upon clicking Ok I would then get the following error

So I needed to disable this "windows feature" so I could do my job and here is how I did it.

WINDOWS XP

Start - Control Panel - System - Advanced (tab) - Settings (Startup and Recovery) - Edit

This will open up Notepad and you want to look for

/noexecute=

Depending on what comes after this statement depends on whether DEP is enabled, disabled or you are given the option to do some settings.

/noexecute=AlwaysOn (this means DEP is enabled and you will not be able to make any changes)

/noexecute=AlwaysOff (this means it is disabled and you are able to install a program.. note: it is not recommended to leave your system in this state long as you will more then likely get software installed that you don't want because windoze is crap)

/noexecute=OptIn (this is the DEFAULT setting and allows you to make changes)

/noexecute=OptOut

If you want to know what state your system is in you can go to the command prompt and type

wmic OS Get DataExecutionPrevention_SupportPolicy[/code]

Which will respond with 1, 2, 3, 4 (which means)

1. /noexecute=AlwaysOn (this means DEP is enabled and you will not be able to make any changes)

2. /noexecute=AlwaysOff (this means it is disabled and you are able to install a program.. note: it is not recommended to leave your system in this state long as you will more then likely get software installed that you don't want because windoze is crap)

3. /noexecute=OptIn (this is the DEFAULT setting and allows you to make changes)

4. /noexecute=OptOut