Question about BIOS and when to switch via USB for a new setup?

Good evening, My question is, I want to completely reset my laptop and reinstall Windows so that all data is completely deleted using “Bitlocker without key” etc. via a bootable USB stick. Question 1: Do I change this in the BIOS, which it boots from the USB stick, before the deletion? Or does it give…

Reinstalled laptop, hard drive is still full, why?

Hello 🙂 I reset my laptop today. But now I've noticed that the hard drive is still full. See image: I've already reinstalled several programs after reinstalling. Have I installed them twice on the hard drive? And why wasn't the hard drive formatted? I thought that happens when you reinstall it too? Do I have…