I think i am stuck.

Hello,
After installing laravel and creating new project using the cmd the server serve command is giving warning that there is no autoload.php file.
please help.

you will find the autoload.php file in vendor

You could try install via Composer Create-Project:

composer create-project --prefer-dist laravel/laravel projectName

laravel has not installed properly install it again.

The autoload.php you found in C:\Windows\SysWOW64\vendor\autoload.php is probably a global composer installation – where you'll usually put things like phpcs, phpunit, phpmd etc.