What u will do if the error feel while u try to download anything from internet.
please keep the way
If your computer is configured to turn on DEP for essential Windows programs and services only, the Change Settings button will not be available from the DEP error message.
You can view the DEP configuration for your computer in System in Control Panel. To do this, follow these steps: 1. Click Start, click Run, type sysdm.cpl, and then click OK.
2. Click the Advanced tab, and then under Performance, click Settings.
3. In the Performance Options dialog box, click the Data Execution Prevention tab.
4. Note if Turn on DEP for essential Windows programs and services only or Turn on DEP for all programs and services except those I select: is selected.
When your computer is configured to turn on DEP for essential Windows programs and services only, you cannot add an exception for a program. This is the behavior that is by design in Windows XP SP2.