DEP – Data Execution Prevention
To do this from the Start menu select All Programs, then go to Accessories and then finally right-click on Command Prompt and click Run as Administrator.
Once the command prompt is open, you can now disable the DEP by entering the following command line.
bcdedit.exe /set nx AlwaysOff
Now restart the server
To reverse the action, simply type this command line to enable DEP back on again.
bcdedit.exe /set nx AlwaysOn