Data Execution Prevention (DEP) is a set of hardware and software technologies that perform additional checks on memory to help prevent malicious code from running on a system.

For further details: visit Microsoft Support KB Article: 875352

There are quite a few methods to check the DEP status, however, we are going to use command line here.
In command prompt, run the following command:

wmic os get dataexecutionprevention_supportpolicy

It should return a numeric value, which denotes the DEP status on the machine. Here are the possible values that are returned and their meaning:

0 - DEP is disabled for all processes.
1 - DEP is enabled for all processes.
2 - DEP is enabled for only Windows system components and services. (Default)
3 - DEP is enabled for all processes.

Hope you find this article helpful!