Downgrade bootcamp from windows 10 to windows 7

[FlamingPixels_]

I installed windows 10 in my macbook with bootcamp around 4 months ago, I really want to downgrade the windows 10 bootcamp to windows 7 but without delete all of the files, do you know how, please help, Thanks 😀

 

[Saga Lout]

You need to buy a full genuine version of Windows 7 on a DVD and use that to format the Windows Partition then make a fresh installation.

 

[ffg7]

cannot downgrade from win 10 to win 7 without doing a fresh install of win 7. that applies to windows computer too & I presume same as downgrading from 1 version of osx to another version of osx. are you using osx at all as 1 customer of mine was just using xp & not osx so I blew the 2 operating systems out & did a fresh install of win 7 which is the only os on his imac.