In the System Properties (IMAGE-3) Click/Select Advanced in Group Performance click Settings.
Then can you change the DEP settings in Windows-7 see Image-4!
For direct open use the command prompt: control sysdm.cpl,,3
(Image-4) Change Data Execution Prevention
(DEP) settings in Windows-7
Info (c) Microsoft:
If you want to turn off DEP for a program you trust, first check to see if the software publisher has made a DEP-compatible version of the program or made an update available before you change any DEP settings. If an update or DEP-compatible version is available, we recommend installing it and leaving DEP turned on so you can benefit from the protection it can provide. But if the publisher has not released an updated, DEP-compatible version of the program, you can turn off DEP for the program. You'll be able to use the program, but it might be vulnerable to an attack that could spread to your other programs and files. Info:
Data Execution Prevention (DEP) is a security feature that helps prevent damage from viruses and other security threats!