Once, I had an electricity stop and of course my computer was shut down violently. On the other day, however i wasn't able to see my desktop icons, start button, quicklauch, etc. but only my wallpaper on the screen, and all i could do was only using Task Manager to run the programs I needed...I restarted the computer several times but nothing changed

... And it was not all...when i tried to run some mp3-s i had error messages for my soundcard. However when I play a game or something i have sound...Help me please!!!