"DEP Fix:
This option disables execution prevention, a feature of Windows Service Packs that can sometimes cause errors. This won’t harm anything, but also isn’t always necessary. To do this:
Right-click on My Computer and select Properties.
Click on the Advanced tab and select ‘Settings’ under Startup and Recovery.
In the Startup and Recovery window, click on the ‘Edit’ button. This will display a text document with system execution parameters - we want to find the part of the text that reads: “ /NoExecute=OptIn “ and change the “OptIn” to reflect “ /NoExecute=AlwaysOff “ - note that the ‘A’ and ‘O’ are capitalized and there are no spaces.
Then go to the file menu and Save the document.
Close the document and click ‘Okay’ in Startup and Recovery."

You should restart your computer before launching ProTools.