Help needed after wrong operations

[christobaldo]

Hi,

I just built my first hackintosh ... going for a triple boot with 3 SSD (OSX, WIN10, Ubuntu).
I installed OSX el captain but still need to add all the drivers (nvidia ...etc).
I made an error installing WIN10, i guess it installed itself in legacy BIOS. Since then clover is unreachable, i still can launch it from USB stick, and choose OSX.

I guess win10 "installed itself" on all my SSD MBR or header.

I want to start it again from scratch, how do i clean (removing MBR &Co) my SSD ?

 

[Going Bald]

Boot Windows installer. At the first screen Shift+F10 to open command window
type the following and hit enter after each line (text after \\ is comment only, do not enter this text

diskpart \\this starts the disk manager
list disk \\determine what disk you want to erase - if only one is connected it is obvious, say your disk is 1
select disk 1 \\you are now locked to disk 1 - every command you give will be done to disk 1 only
clean \\totally wipes the drive
convert gpt \\ changes MBR partition tables to GUID partition tables
list disk \\verify disk 1 is gpt and has 100% free space
exit \\exits diskpart
exit \\ exits command terminal

you now have a clean, unformatted drive with nothing but free space on it. To triple boot on same drive see https://www.tonymacx86.com/threads/guide-multibooting-uefi.197352/