Graphic Card Problems

[Warveil]

Thanks; i'll try and come later

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Okay, I just made it, but my computer turned into a black screen. After something like 10 seconds, I turned it off and on again.
Now i have 2 things :
This. Maybe it's like "No graphic Card detected"


And.. this scary thing.



I think the computer use the Card I desactivated to run normal programs and system things, and it just turn on the Nvidia to play games or to see movies. No ?
Must I reactivate my other card ?