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#21
The absence of installed features display indicates System File corruption, so you should have run SFC -SCANNOW Command by now as suggested.
These problems become increasingly common with tweaking Win7 beyond normal System settings. While installing Dell Dock, or Rocket Dock, etc is not exactly tweaking it is a kind of add-on which can destablize the OS. You may get better performance and avoid corruption by trying to adjust to the Win7 GUI and features which are the most lavish of any OS ever, and can be theme-adjusted.
Rocket Dock for example is flashy because icons jump out at you. But Win7 Taskbar is a stable version of this which also gives you full rightclick history of each program when it's open or pinned there. I prefer functionality over flash. Most who rush to "Rocket their dock" don't even bother to study the Win7 taskbar's features and added functionality.
At least give Win7 the chance to prove itself and its features before tweaking and modding it, which will almost always come back to bite you.