Drivers wont install? please help

Hi everyone, I have just built my first ever computer and installed Windows 7 on it, I have inserted the MSI disk that came with the MSI motherboard but it failed to load up, so I went in to device manager and noticed that there were some things with yellow icons next to them, so I installed all of them apart from the Ethernet Controller and the Bus controller as they failed, it said for the ethernet controller that a driver was found but failed to install and for the Bus controller no drivers were found from the CD in the DVD-RW Drive.

The problem I have is that without the ethernet controller installing I cannot access the internet to download drivers, please can someone help me out?

I'm starting to think that maybe I missed something out while putting the computer together as it is my first time ever, thank you for help!