Ethernet controller please....

Hello,

hi...i formatted my windows 7 intel core i3 acer laptop,but i dont notice that the windows 7 that i put in my acer is the samsung windows 7 CD and it says there that it is only for samsung laptops...and when i started using my laptop i noticed that when i open the device manger there are so many yellow signs in it...including Ethernet Controllers,standard VGA graphics adapter.,PCI simple communications controller and unknown device..please help me solved this problem....i have another laptop that have an access to internet...thank you