Magento 2:Vender Autoload error in XAMPP,AppSer

following step:

Magento 2 installation time error:



Vendor autoload is not found. Please run 'composer install' under application root directory.



1)Search composer in search engine

2)download composer(https://getcomposer.org/download/)

3)installing in computer or laptop

4)setting check(composer installation time showing window):

1)select php folder in server

2)php path should be selected(example:C:\bitnami\php\php.exe)

3)every server having php folder and php.exe file

5)Internet is required for downloading another software for vendor autoload

6)go to magento 2 folder in server (Example:C:\bitnami\htdocs\magento2)

7)then shift+right click

8)It will installing all related software trhough command prompt

9)server restart

10)installing magento 2