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
