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Disable Data Execution Prevention (DEP) Windows Vista.
Data Execution Prevention is a security feature that can be a bit of a pain at times. Often things will simply appear not to run at all; hopefully you will notice a bubble from the taskbar letting you know that DEP is the cause. If Vista (and actually this has been around since Windows Server 2003) sees that a process is being spawned that "could" be unwanted, DEP shuts it down. This is especially common in some application installations: if a Windows Installer setup (MSI) calls an executable in Vista, DEP could very well put a stop to it. If you are trying to run an installation or other executable being stopped by DEP, it could save you some trouble so turn it off while you attempt to give it another shot…
Run a command prompt as administrator. From the start menu, select "All Programs", then "Accessories" and right-click on the "Command Prompt" shortcut and choose "Run As Administrator". From here you can use the following command to disable Data Execution Prevention (DEP) with the following command:
bcdedit.exe /set {current} nx AlwaysOff
Keeping your command prompt open, run your setup or other process being stopped by DEP. Then, to turn it back on again, do the same and run the following:
bcdedit.exe /set {current} nx AlwaysOn
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