What Is Data Execution Prevention(DEP) And How To Disable It In Windows 7 / Vista

What is DEP ?

In Microsoft’s own words,
Data Execution Prevention (DEP) is a security feature that can help prevent damage to your computer from viruses and other security threats. Harmful programs can try to attack Windows by attempting to run (also known as execute) code from system memory locations reserved for Windows and other authorized programs. These types of attacks can harm your programs and files. DEP can help protect your computer by monitoring your programs to make sure that they use system memory safely. If DEP notices a program on your computer using memory incorrectly, it closes the program and notifies you.

Why disable DEP ?

I was running multiple processes on different tabs in Firefox 3,  finally my Firefox crashed and Microsoft gave a very beautiful reason for the crash which you have read above. Actually it happened the moment I clicked on a YouTube video, it sounds weird, right? If you are a heavy geek like me, who works on multiple Firefox tabs and also use online services that need to access your system memory, then your Firefox is definitely going to crash unless you don’t disable DEP. Another reason to disable it is when it does not allow you to open Executable files that needs to access your system memory. Read More