Right click on ppsspp try and run as admin also update all windows files incase, Its worth to mention im using windows 7 so it may not work for you, let me know how it goes m8.
Try this type cmd in start menu, right click on it run as admin, Once the command prompt is open, you can now disable the DEP by entering the following command line.
bcdedit.exe /set nx AlwaysOff
3. And to enable it back,
bcdedit.exe /set nx AlwaysOn
If this doesnt work try a full reinstall if nessassry
Try this type cmd in start menu, right click on it run as admin, Once the command prompt is open, you can now disable the DEP by entering the following command line.
bcdedit.exe /set nx AlwaysOff
3. And to enable it back,
bcdedit.exe /set nx AlwaysOn
If this doesnt work try a full reinstall if nessassry