hey everyone, new here and i know you guys can help me out! i want to delete windows off my macbook pro and reinstall a new version cause the one i have no was a trail of 7 from long ago. if i follow the steps on the apple site to uninstall windows and just have my OSX operating system again will i lose anything from my OSX operating system? or will it just make the harddrive one partition again? i use it for school and cant afford to lose all the stuff i have on it. thank you for your time! also, if i were to just upgrade windows from an updater to a legit version would i somehow wipe out my OSX operating system?