First Download Kali linux from here
Now click continue.
Boot your pc with Kali Linux once booted, Select Graphical Install
Select your language and click continue.
Select your Location and click continue.
Configure your Keyboard and click continue
Type Your Desired Host name and click continue.
Click continue
Set your root password and click continue.
Configure the Clock and click continue.
Now Click on Guided - Use entire disk and click continue.
Now Click on All Files in One Partition and click continue.
Now click continue.
Select option yes and click continue
Select option no and click continue
Select option yes and click continue.
Now installation is finished and completed
Log into Kali Linux with the username and password