How to "MAC OS " full system recovery ?

[JoeyAsh]

My friend and I tired everything to install Ubuntu on MacBook pro 2010 bc it went so damn laggy , he cant even use it anymore or play Lol and MC with me .. then someone told me about the Apple system recovery ? Do you guys have that? I'm a user of windows I've ever used a MacBook " As my laptop but I always use my friend's MacBook" I know that I can system recovery on windows.. Can we do it in mac ?
Oh and please give us simple tips etc.. xD we wont understand those hard "Macie" things lol
Thanks <3

 

[anon(9602380)]

Here is guide by Apple on how to reinstall Mac OS.