|Almost every computer you buy has some way to start all over. I do it a lot.|
Some times they give you real honest to goodness disks to use. Most now tell you to create them the moment you get the system up. (almost no one make them).
Some have a way to both create disks and or use a F key at boot to access some recovery or restore program.
Some ask you to purchase disks from the company.
That all should be in the owners manual but that last computer I got didn't even come with a manual. Lucky I knew enough to create disks, image the system with a clone tool.
A Pit Bull is like a gun you can pet. And there is no safety on it.