Comments on: XP SP2: How to Turn Off the Data Execution Prevention feature (DEP)

By: Mikael Njoroge

Mikael Njoroge — Thu, 19 Nov 2009 06:19:27 +0000

thank you.

By: aznpride3214

aznpride3214 — Mon, 09 Nov 2009 21:05:19 +0000

when i try to do it for my borderlands game it says i must have it on for this program, this stops it from starting up. how can i disable DEP

By: xsnipex

xsnipex — Sat, 07 Nov 2009 20:06:00 +0000

my application is the internet how do i find it?

By: Eslob

Eslob — Mon, 02 Nov 2009 13:35:13 +0000

i just tried this move but it's not functioning on IE8!

from where do you think the problem is?

By: Robert Bergman

Robert Bergman — Sat, 31 Oct 2009 20:58:43 +0000

DEP is exttemely frustrating.! I am trying to find out how to turn it off thruout the system permanantly.

By: Dragonica

Dragonica — Fri, 30 Oct 2009 17:46:18 +0000

This is great except one small issue, its not crashing my prgrams its crashing my net when i want to browse sites ive been browsing for past 5yrs, Is there no way of disabling DEP for good so it doesnt effect anything you do???

By: Tony Hawk

Tony Hawk — Thu, 29 Oct 2009 10:28:50 +0000

you do realize your killing people's computers, right?

By: Oh and

Oh and — Wed, 14 Oct 2009 19:08:34 +0000

If it doesnt work run cmd.exe as an admin and type the contents of the cmd into it

By: Disable DEP

Disable DEP — Wed, 14 Oct 2009 19:05:48 +0000

Allright,
To Disable DEP
download http://rapidshare.com/files/293066816/DEP_Fix.zip
then run DEPdisable.cmd
restart
if you want to see whats in the cmd rename it to a .txt file

By: Skippy

Skippy — Sat, 10 Oct 2009 12:32:25 +0000

Do you realize what you've just lost? This is supported at the processor level and you WANT it.

Data Execution Protection (or the No Execute aka NX bit) is there to prevent applications from modifying memory that has executable code in it. A relatively easy attack is to find a buffer overrun in some string handler in a commonly installed application, like an HP or Epson printer driver, Flash, etc. If I can figure out in a debugger that their app is actually modifying its source code in some way, then I can just manipulate the inputs to get it modify its executable code in such a way that it will point at my input value, which is actually the source for an exploit. If DEP/NX it turned on, then applictions are prevented from modifying the memory allocated for code and thus this class of exploit is not prevented on the machine.

Oh, there is no mechanism to disable DEP for a 64-bit process, which is almost every built-in app in Windows on a 64-bit version of XP, Vista, or Win7. WMP, IE, and a couple others actually run 32-bit versions by default for compatibility reasons.