Isuess after reformatted

I currently reformatted my Alienware laptop with the window7 64bit which was provided with my laptop at purchase. Now after I finish formatting the laptop I was missing a lot of programs like the dell ones and the Alienware software which helps change the colour of my desktop and so on... Is there a way of getting these programs back ?Then my laptop cannot find any wifi connection in my home and my wifi is all fine and connective. I went on network and sharing center and there is a big cross between my computer and Internet ... It wont let me use the internet