My computer won't turn sour properly after installing bright graphics card! HELP!?

My system won't shut down right. I own a HP a1547c. I installed a new PNY 7600GS. Everything else works fine. But when i shut down, it stays at the blue shut down eyeshade. The HDD light blinks for a while later stops blinking. =( My mouse still moves. I also downloaded some shutdown registry thing becasue a HP assistant told me too. It doesnt work. http://www.kellys-korner-xp.com/regs_edi... This is the cooperation to it. My OS is win xp media edition. i get new bios updates. I took my card and it still doesnt shut down irght. I resetted bios too.

Answer:
Reseat your card contained by the slot and download the newest drivers from Nvidia.
look contained by task officer to see whats running. something dont wanta stop

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