Blue Screen / My Computer Is Messed Up

Out of no where, my computer just shuts off, so I turn it back on and a blue screen appears. It says that it had to shut down windows so that it doesnt cause any problems. So i restart my computer and then when i go to log in, my normal log in screen doesnt appear. It shows a box that says Account Name, and password. Usually its the normal log in screen with the pictures to click on to get into an account. So i "log in", and nex thing I notice is the icons on the desktop have a wierd color to them.Then I notice there is a grey bar covering my taskbar and Start button. I cant click the start button at all. And when I click the Windows button on my keyboard, it pops up the start menu but it doesnt have any icons beside the names. It sort of looks like im in safe mode, but im not.And when I right click on My computer, it doesnt show the General, Computer Name, or Automatic Updates tabs. When I click on the Remote tab, it doesnt show anything and then the tab just disappears.Also when I try starting a program like World of Warcraft, or Ventrillo it says "The application has failed to start becuase the application configuration in incorrect. Reinstalling the application may fix this problem."