Disable DEP Windows XP

You can turn off DEP completely either manually by changing an entry in the boot.ini [ Typically found diectly on Windows %System Root%] or by accessing it from System Properties then select the Advanced tab. then select the settings beside the Start up and Recovery portion of the bottom of the window. Then select the edit at the top underneath System Startup. Change the following entry:

/NoExecute=OptIn

to

/NoExecute=Alwaysoff