by June 2, 2005 0 comments

Security threats have become so common and come in through so many avenues that you never know where will they stike next. So the usual precautions are to install anti-virus software and firewall on your PC. 

By and large, these are sufficient to block most threats. However, malware writers can also write code to
bypass the anti virus and execute it from the physical memory itself. So you need to do something more. If you are a Win XP user, there is a tool you can use that comes with Win XP SP2, known as DEP. 


Applies to: Win XP users 

USP: Enable Data Execution Prevention for all programs on your computer

Primary link: 

Google keywords:
Memory protection + Windows XP

DEP (Data Execution Prevention) is a method that prevents the system from executing contents in the ‘data’ areas of RAM. This also eliminates many situations where the system would otherwise have crashed. By default, the feature is enabled in systems with SP2 installed. We need to fine tune it. In this article, we see how to do that. Make sure you have SP2
installed on your PC.

The feature is always on, but we need to configure it a little better. Run the System applet from the Control Panel and go to Advanced tab, and click on Settings for performance

Here enable the ‘Adjust for best performance’ tab and select the DEP or the ‘Data Execution Prevention’ tab to 
By default DEP is set for Windows programs and services. So, you need to turn it on for all programs/services It prevents any application from executing from the non-executable (data) memory, and displays this message

Sanjay Majumder

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