My first thought when I read this first post was, "What the heck is dep". So I Googled it and found
this in Wikipedia. I can't provide an answer to the posters question, but thought this might be helpful.
EDIT: The "Discussions" section of the Wikipedia article is also very interesting, especially regarding the accuracy of the article itself. I checked the status of DEP in my XP Home SP3 and found it default set to 'Turned on for essential Windows programs and services only". Prior to this I've never even heard of DEP.
Raybro