Erased HD...now macbook doesn't work

[JR12]

So I have a macbook pro retina display and I had bootcamp installed with windows 7. I erased the macintosh HD and now when I boot it, it runs windows 7. I want to delete windows 7 all together and just get my computer back to the way it was out of the box. Any ideas?

 

[Bruno09]

Hi,

see here : http://support.apple.com/kb/HT4718?viewlocale=en_US&locale=en_US

 

[JR12]

Okay I actually figured out how to delete windows 7 and reinstall mountain lion. I am having another issue though. My iLife applications are not anywhere to be found though. I tried to download it from the app store but it tells me my apple ID was not authorized to download. I restarted my computer and now it says they are all $15. Do I really need to buy them?