How to reinstall Windows 10 from usb without losing files?

Reinstalling Windows 10 from a USB drive can be a bit complex, but it's a straightforward process. Here are the steps to reinstall Windows 10 from USB:

Step 1: Prepare the USB drive

• Insert the USB drive: Insert the USB drive into your PC.
• Open Rufus: Run Rufus and select your USB drive from the list.
• Select ISO file: Click the "Create a bootable disk using" drop-down menu and select the Windows 10 ISO file you downloaded.
• Setup settings: Make sure the following settings are correct:
  - Boot selection: UEFI (non-Legacy)
  - Partition scheme: GPT (non-MBR)
  - Target system: UEFI firmware
• Boot process: Click "Start" to create a bootable USB drive.

Step 2: Boot from the USB drive

• Restart your PC: Turn your PC off and back on. Press the key to enter the BIOS (usually F2, F12, or Del).
• Enter the BIOS: Use the arrow keys to navigate to the Boot section. Set the USB drive as the first boot device (usually option 1).
• Save and Exit: Save your changes and exit the BIOS.

Step 3: Reinstall Windows 10

• Boot from USB drive: Your PC should automatically boot from the USB drive.
• Windows 10 Setup: Windows 10 Setup will launch. Follow the prompts to select your language, time and currency format, and keyboard layout.
• Install Windows 10: Select the Custom installation option to reinstall Windows 10.
• Format Hard Drive: Select the drive you want to reinstall Windows 10 on, and then select the Format option.
• Wait to install: This process may take some time, depending on your system configuration.