i've got a dell dimension c521 desktop an i have had it for about a month, and i'm not a gamer but i do play one game on my computer and up until now it worked fine,but out of nowere it will no longer play my game and the gameing graphics score on system info droped from 5.0 to 3.0 overnight, and by the way my graphics card is a nvidia geforce 6150 LE and the game is star wars empire at war. All the drivers are up to date.