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i installed a new graphic card nvedia series6 2gb ddr3, and my windows get stuck on recovery when i try to do it and it gives error when i hit start windows normally... i tried to install fresh copy of windows but it get stuck on the first screen where to choose language and hit next, i disconnected the hard and installed new one where windows xp is already installed and it start as usual , also i have installed a fresh copy on the hard drive of the 1st computer on other pc and did the installation but when i put it back to the 1st pc it gives error after the windows 7 logo screen. please help.

thank you.

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