Back up any important files
Create a Windows 10 bootable USB using the Media Creation Tool
Insert the USB drive into the PC
Restart the PC
Enter the boot menu or BIOS/UEFI setup
Set the USB drive as the first boot device
Save changes and restart
Press any key to boot from the USB if prompted
Select language, time, and keyboard preferences
Click Install now
Enter the product key if required, or choose I don’t have a product key
Select the Windows 10 edition that matches your license
Accept the license terms
Choose Custom: Install Windows only
Select the drive or partition where Windows is installed
Delete the existing Windows partitions if performing a clean install
Select the unallocated space
Click Next
Wait for Windows to install and restart
Remove the USB drive when prompted or after the first restart if needed
Complete the on-screen setup steps
Install drivers, updates, and required software
Restore your backed-up files