6) I've tried disabling the automatic updates, and then I've restarted. I haven't tried this for two days because I'm afraid of something going wrong. If I try this, should I be afraid of getting a virus?
You need to have an Apple USB device to install Windows 10 on your Mac. In other words, you can't use a DVD. You need an USB external hard drive, USB 3.0 Flash Drive, or a USB pen drive.
If you have a bootable USB, it is as simple as restarting your Mac, plug the USB into the USB port and click on the power button at the same time.
To skip the booting process, you can also restart your Mac, press the 'Optimise EFI' button on your keyboard when the Apple logo appears on the screen and then press the power button. 827ec27edc