I opened up my computer the other day to measure the amount of space in my case for a new graphics card I will be getting. I pulled out the power connector on my card by accident and put it back in. Then when I tried to turn my computer back on I couldn't get it to display anything on my monitor so I had to play around with the DVI cable and finally got it to work. Then when I turn on my screen I see that my computer has crashed and the crash message was something along the lines of a display driver crash. I restarted my computer and now the toolbar at the bottom of the desktop is showing up as it would in the windows classic theme and the audio drivers aren't working. Also, about every thirty minutes the screen will turn off then back on again.
Did all this fiddling around happen while the computer was running? Disconnecting power cables while running can be a problem...
Make sure the power connector is firmly seated so it's getting a good power connection. You might also try reinstalling the graphic card drivers to see if that resolves the issue.
Any further details you can provide everyone on your system could help.
I didn't have the computer on or plugged in when I was doing this. There was an electrical storm last night and a bolt hit us very close by and shorted out much of the stuff inside the house was screwed up because of this. I have it plugged into a surge protector but i'm not sure if that was enough to protect it this time. I know this sounds like a ridiculous thing but it feels like something to consider. I am very new to this site so I don't know if it will show my computer specs down below or not.