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Well, for DWM off you have two UI choices, Windows Classic and Vista Basic. But, if you are going to keep DWM running to correct your subtitle problem, you will need to use Aero or Vista Standard. I am guessing that by "Aero effect" you are talking about the window tramsparency. You can turn that off by going to "Personalization">"Window Color and Appearance">un-tick the "Enable Transparency" box. This sets you to Vista Standard, but this also leaves the minimzation animation inact..