Data Execution Prevention, or DEP, raises an exception if it detects code loading from the default heap or stack. Since this behavior is indicative of malicious code (legitimate code does not generally load in this manner), DEP protects the browser against attacks rendered, for example, via buffer overflow and similar type vulnerabilities.
DEP was first introduced in Windows XP Service Pack 2. If running Internet Explorer v6 on Windows XP SP2, follow the instructions below to enable DEP.
Also see: How to Enable DEP on IE7
- From the desktop, right click the My Computer icon.
- Select Properties
- Select the Advanced tab
- Under the Performance heading, select Settings
- Select the Data Execution Prevention tab
- Select the option to Turn on DEP for all programs and services except those I select
- Click Apply then click OK to accept the changes and exit the program.