Extract and Unzip elasticsearch-8.1.0-windows-x86_64.zip
Extract and Unzip kibana-8.1.0-windows-x86_64.zip
Rename the folders to
elasticsearch-8.1.0
kibana-8.1.0
Modify the file "C:\elasticsearch-8.1.0\config\elasticsearch.yml"
Add below line
xpack.security.enabled: false
at the end