Question: When I tried to install fresh Wordpress package in the local system(Window 10), I got this error:

> 
> Fatal error: require(): Failed opening required  
> 
>  'C:\xampp\htdocs\wordpress/wp-blog-header.php'
>  (include\_path='.;C:\xampp\php\PEAR') 
>  in C:\xampp\htdocs\wordpress\index.php on line 17
> 
> 
> 

For Localhost am using XAMPP server.

Answer: 
It may be occurred due to some files are missing..

Download a fresh copy of the WordPress .zip file to your computer, unzip it, and use that to copy up all files and folders EXCEPT the wp-config.php file and the /wp-content/directory. You may need to delete the old wp-admin and wp-include folders.

Note- Please backup files and database before doing any actions.
I faced the same error.  

The solution is to simply extract the WordPress zip folder content into `htdocs` ( if you are using xampp ) or into `www` (if you are using wampp ).  

Just do not extract it somewhere else and then into htdocs, or else it won't work.