To completely disable DEP in Windows Server 2003, perform the following with administrative credentials: 1. Open Windows Explorer 2. Tools > Folder Options > View 3. Uncheck Hide Protected operating system files (Recommended) and Hide extensions for known file types 4. Click apply > OK 5. Browse to C:\ 6. Right click on boot.ini, select properties and ensure the “read-only” tab is unchecked and click OK 7. Edit boot.ini 8. Modify the  /noexecute= For example, set  /noexecute=AlwaysOff to disasble DEP entirely 9. File > Save, close boot.ini file 10. Right click on boot.ini, select properties and ensure the “read-only” tab is checked and click OK 11. Reboot the computer