How can I reinstall Windows 10?

I just asked a question a short while ago, but I noticed one thing: How can I reinstall Windows 10? Is there a way? Because I do not want to lose things and stuff, but is there? Because if so, then I will not replace the laptop with new ones (laptop / computer). Please tell me.

Oh my God. Is there really no one here who believes in the German language?

You're doing all the stuff stuff on a freshly formatted USB stick, which is also Windows 10 on it, and then you have to enter the BIOS and everything. Unfortunately, I can't explain it, because you have to ask someone who will help you further

If you every time, when Windows zickt throw away the calculator you can also burn money. Of course you can reinstall an operating system.