Add this Code in C:\xampp\apache\conf\extra\httpd-vhosts.conf
<VirtualHost *:80>
DocumentRoot "C:/xampp/htdocs"
ServerName qa-staging.com
ServerAlias www.qa-staging.com
<Directory "c:/xampp/htdocs">
Order allow,deny
Allow from all
</Directory>
</VirtualHost>
Now Add your virtual host name in bellow file.
C:\Windows\System32\drivers\etc\hosts
127.0.0.1 qa-staging.com
If you are not able to save this code in host file then right click on notpad select Run as administrator and then you can able to save your custom code now restart your XAMP