OK, recently I was playing an online video game and my game froze up. My first thought was, "Oh my internet died." Then my whole computer shut down. I tried booting up again and heard my computer running but saw nothing on my screen. After a few more attempts I disconnected everything and opened up my PC. It turns out that the lock holding down the graphics card had popped open and some how my graphics card dislogged itself while my computer was running. So I reinserted it and locked it down tight and proceeded to connect everything etc. and boot up. When I turned on my PC it brought me to a screen telling me about how they were sorry for the inconveinence and prompted me to choose a start up mode, Safe mode, Safe mode with command prompt, Safe mode with networking, Last known good configuration, and Start windows normally. Everyone of the settings I choose bring me to the Windows XP loading screen with the bar that goes across, then my screen goes black and it starts the whole process over again and goes to that same menu where I can choose the start up mode.