Just a small tip for all laptop users. If you frequently run oob (out of battery), then you should consider deactivating all visual effects and downloading a darkish minimalistic Windows 7 theme.
Why dark? A dark screen consumes less energy. If you are on a laptop, battery is crucial, so you should install a dark theme on Windows 7.
Keep in mind, you don’t want a dark Windows 7 theme with fancy effects (that would possibly consume more energy than a light theme). Instead try to find a dark minimalistic theme.
The dark theme simplicity can be found on the second list (number 10).