I just built a PC and accidentally installed Windows 10 on the HDD instead of SSD (my SSD wasn't powered when I was installing the OS). I then disconnected the HDD and installed Windows 10 on the SSD. When connecting both SSD and HDD, only HDD displayed on 'My PC', and it wouldn't allow me to delete Windows 10. How do I wipe everything on my HDD since I already have Windows 10 on my SSD?