Hi hoanglinh191191, Dell Inpiron N5010 does not have windows 8 drivers yet which might get released in future, I request you to do a complete windows update on the computer. Drivers updates are also pushed through windows update. Then, if you are missing any drivers, I suggest you to download windows 7 drivers and check if it works.  If you have any questions, please reply to the post.
I am using Dell Inpiron N5010 (Service tag <ADMIN NOTE: Service tag removed per privacy policy> ). I am willing to use The Windows 8, but the Dell's homepage is not support the drivers for Windows 8. I want to ask about the time which you supply driver for Windows 8)? Thanks...
Driver for Windows 8